Successful systems engineering

Routeur Soekris Engineering net4801 OpenSBD/FreeBSD/Proxy/VPN/Linux. État : Reconditionné par le vendeur Service de livraison : Colissimo Connectiques fournies:  - Alimentation - Câble monitoring   * 233 to 266 Mhz NSC SC1100 single chip processor * 32-256 Mbyte SDRAM, soldered on board * 4 Mbit BIOS/BOOT Flash * CompactFLASH Type I/II socket, 8 Mbyte FLASH to 4 Gbyte Microdrive * UltraDMA-33 interface with 44 pins connector for 2.5" Hard Drive * 1-3 10/100 Mbit Ethernet ports, RJ-45 * 2 Serial ports, DB9 and 10 pins header * USB 1.1 interface * Power LED, Activity LED, Error LED * Mini-PCI type III socket. (t.ex for optional hardware encryption.) * PCI Slot, right angle 3.3V signaling only, dual PCI slot option planned. * 12 bit general purpose I/O, 20 pins header * Temperature and voltage monitor * Hardware watchdog * Board size 5.2" x 5.7" * Power using external power supply is 6-20V DC, max 15 Watt * Option for 5V supply using internal connector * Operating temperature 0-60 °C * comBIOS for full headless operation over serial port * PXE boot rom for diskless booting * Designed for FreeBSD, NetBSD, OpenBSD and Linux * Runs most realtime operating systems

Souris sans fil souris sans fil 2,4 GHz défilement optique pour ordinateur po SH   Features: 1.100% brand new and high quality. 2.Supports Plug & Play - no drivers required. 3.2.4 GHz Bluetooth. 4.The USB receiver can be accommodated in the battery compartment. 5.Integrated battery saving function - automatic shutdown of the mouse when inactive. 6.Power supply: 2 x AAA batteries (not included). 7.Buttons With scroll wheel (2 buttons + 1 scroll wheel + 1 DPI button). 8.Receiving range: approx 10 meters. Specification: About 2.4G+Bluetooth dual-mode charging wireless mouse installation process: 2.4G mode 1.Plug the receiver into the USB port of the computer (The receiver is located at the bottom of the mouse, please pull it out with your hand and come out) 2. Wait about 20 seconds and then push the power switch to the 2.4G mode file, the connection can be used normally. Bluetooth mode: 1.First open the computer Bluetooth search, 2.Push the power switch to the Bluetooth mode 3.Then find (BT5.1Mouse or BluetoothMouse) on the device that supports Bluetooth 4. Click the pairing link, the link can be used normally after successful. mma About the dual-mode charging wireless mouse charging process: Plug the charging cable or data cable with microUSB2.0 interface into the microUSB2.0 charging interface of the mouse, and then plug the other end of the cable into the USB interface of the computer to charge the mouse. (Computer USB interface, mobile phone charger, mobile power supply can charge the A5 intelligent multi-mode mouse) When the mouse is charging, the blue light on the charging interface will always be on, and it will automatically turn off when fully charged. It will be full in about 3 hours. Compatible operating systems: Windows Vista, 7, 8, 10 or later | Mac OS 10.6 or later | Linux Our easy-to-use, reliable and wireless mouse is available in black, white or pink. The wireless ultra slim mouse will quickly convince you with its ergonomic shape, thanks to which you can handle the input device comfortably. Due to the dimensions, the mouse is ideal for mobile use in conjunction with a notebook / laptop. Work efficiently on your laptop or PC thanks to the smooth and precise tracking of mouse movements. The mouse has an energy saving function. This automatically switches the mouse off when it is inactive, which saves the batteries and extends the life of the mouse. Note: We have different types of products, you can choose which one you need. Package inclulding: 1x 2.4GHz ultra slim mouse 1x USB receiver Payment Nous n'acceptons que Paypal comme moyen de paiement. L'article sera envoyé dans 24 heures suivant le paiement reçu du lundi au vendredi, et les commandes reçues le samedi et le dimanche seront affichées le lundi suivant. Shipping Nous fournissons des choix multiples pour les méthodes d'expédition et la date d'arrivée estimée, mais veuillez comprendre que nous ne pouvons pas contrôler la condition d'expédition actuelle et la date d'arrivée. Terms of Sale Si vous n'êtes pas satisfait de votre achat, contactez-nous sans hésiter. Les articles peuvent être retournés dans 30 jours en état inutilisé, nous effectuerons un échange et un remboursement une fois que nous aurons reçu l'objet. Gardez les étiquettes entières et les éléments propres sans saveur, si non nous n'accepterons pas le retour. About US Si vous avez des questions, contactez-nous par l'intermédiaire de l'onglet «Demandez-nous un vendeur» au bas de la page d'inscription. Répondre à votre satisfaction est la chose la plus imotante pour nous, nous souhaitons résoudre chaque problème pour vous. Et laissez-nous une note de  5 étoiles  si vous vous sentez heureux de notre produit et service. Features: 1.100% brand new and high quality. 2.Supports Plug & Play - no drivers required. 3.2.4 GHz Bluetooth. 4.The USB receiver can be accommodated in the battery compartment. 5.Integrated battery saving function - automatic shutdown of the mouse when inactive. 6.Power supply: 2 x AAA batteries (not included). 7.Buttons With scroll wheel (2 buttons + 1 scroll wheel + 1 DPI button). 8.Receiving range: approx 10 meters. Specification: About 2.4G+Bluetooth dual-mode charging wireless mouse installation process: 2.4G mode 1.Plug the receiver into the USB port of the computer (The receiver is located at the bottom of the mouse, please pull it out with your hand and come out) 2. Wait about 20 seconds and then push the power switch to the 2.4G mode file, the connection can be used normally. Bluetooth mode: 1.First open the computer Bluetooth search, 2.Push the power switch to the Bluetooth mode 3.Then find (BT5.1Mouse or BluetoothMouse) on the device that supports Bluetooth 4. Click the pairing link, the link can be used normally after successful. mma About the dual-mode charging wireless mouse charging process: Plug the charging cable or data cable with microUSB2.0 interface into the microUSB2.0 charging interface of the mouse, and then plug the other end of the cable into the USB interface of the computer to charge the mouse. (Computer USB interface, mobile phone charger, mobile power supply can charge the A5 intelligent multi-mode mouse) When the mouse is charging, the blue light on the charging interface will always be on, and it will automatically turn off when fully charged. It will be full in about 3 hours. Compatible operating systems: Windows Vista, 7, 8, 10 or later | Mac OS 10.6 or later | Linux Our easy-to-use, reliable and wireless mouse is available in black, white or pink. The wireless ultra slim mouse will quickly convince you with its ergonomic shape, thanks to which you can handle the input device comfortably. Due to the dimensions, the mouse is ideal for mobile use in conjunction with a notebook / laptop. Work efficiently on your laptop or PC thanks to the smooth and precise tracking of mouse movements. The mouse has an energy saving function. This automatically switches the mouse off when it is inactive, which saves the batteries and extends the life of the mouse. Note: We have different types of products, you can choose which one you need. Package inclulding: 1x 2.4GHz ultra slim mouse 1x USB receiver PAYMENT Nous n'acceptons que Paypal comme moyen de paiement. L'article sera envoyé dans 24 heures suivant le paiement reçu du lundi au vendredi, et les commandes reçues le samedi et le dimanche seront affichées le lundi suivant. SHIPPING Nous fournissons des choix multiples pour les méthodes d'expédition et la date d'arrivée estimée, mais veuillez comprendre que nous ne pouvons pas contrôler la condition d'expédition actuelle et la date d'arrivée. Terms of Sale Si vous n'êtes pas satisfait de votre achat, contactez-nous sans hésiter. Les articles peuvent être retournés dans 30 jours en état inutilisé, nous effectuerons un échange et un remboursement une fois que nous aurons reçu l'objet. Gardez les étiquettes entières et les éléments propres sans saveur, si non nous n'accepterons pas le retour. ABOUT US Si vous avez des questions, contactez-nous par l'intermédiaire de l'onglet «Demandez-nous un vendeur» au bas de la page d'inscription. Répondre à votre satisfaction est la chose la plus imotante pour nous, nous souhaitons résoudre chaque problème pour vous. Et laissez-nous une note de  5 étoiles  si vous vous sentez heureux de notre produit et service. Le 24-sept.-20 à 13:01:00 Paris, le vendeur a ajouté les informations suivantes:

digital equipement corporation - products and services circa 1960/1970 très beau document publicitaire pour DEC datant probablement de la fin des années 60, sans date. avec les produits PDP 8i, PDP 8L, PDP 12, PDP 15, PDP 10, PDP 14, peripherals, DEC supplies, manufacturing very interesting leaflet of DEC probably from the end of the 60's, not dated. with the products PDP 8i, PDP 8L, PDP 12, PDP 15, PDP 10, PDP 14, peripherals, DEC supplies, manufacturing Nombreuses photos des ordinateurs disponibles, de periphériques et de l'usine / numerous photos of available computers, peripherals and the factory dimensions: 28 x 21,5 cm - 20 pages - 011. 00969. AIE   S. 02. 50 rare document - assez bon état - couverture un peu tachée, intérieur propre / good condition, cover with stains, inside is perfect N 'hésitez pas à poser des questions si vous avez besoin de plus de détails. Remise en mains propres sur Paris 8ème - secteur Europe - Pour des achats groupés, les frais d'envois seront ajustés For bidders from foreign countries, don't hesitate to ask for the postage price, I'll give you the exact price. English, spanish, japanese and chinese language = OK Au sujet de cette marque / about DEC, (source wikipedia): Digital Equipment Corporation (DEC /dɛk/), using the trademark Digital, was a major American company in the computer industry from the 1960s to the 1990s. The company was co-founded by Ken Olsen and Harlan Anderson in 1957. Olsen was president until forced to resign in 1992, after the company had gone into precipitous decline. Although the company produced many different product lines over their history, they are best known for their work in the minicomputer market starting in the mid-1960s. The company produced a series of machines known as the PDP line, with the PDP-8 and PDP-11 being among the most successful minis of all time. Their success was only surpassed by another DEC product, the late-1970s VAX "supermini" systems that were designed to replace the PDP-11. Although a number of competitors had successfully competed with Digital through the 1970s, the VAX cemented the company's place as a leading vendor in the computer space. As microcomputers improved in the late 1980s, especially with the introduction of RISC-based workstation machines, the performance niche of the minicomputer was rapidly eroded. By the early 1990s, the company was in turmoil as their mini sales collapsed and their attempts to address this by entering the high-end market with machines like the VAX 9000 were market failures. After several attempts to enter the workstation and file server market, the DEC Alpha product line began to make successful inroads in the mid-1990s, but was too late to save the company. DEC was acquired in June 1998 by Compaq in what was at that time the largest merger in the history of the computer industry. During the purchase, some parts of DEC were sold to other companies; the compiler business and the Hudson, Massachusetts facility, were sold to Intel. At the time, Compaq was focused on the enterprise market and had recently purchased several other large vendors. DEC was a major player overseas where Compaq had less presence. However, Compaq had little idea what to do with its acquisitions, and soon found itself in financial difficulty of its own. The company subsequently merged with Hewlett-Packard (HP) in May 2002. La société a été fondée en 1957 par Ken Olsen, un ingénieur du Massachusetts qui avait travaillé sur le projet TX-2 au laboratoire Lincoln du Massachusetts Institute of Technology (MIT). Le TX-2 était un ordinateur basé sur des transistors. Lorsque ce projet rencontra des difficultés, Olsen le quitta pour fonder DEC avec Harlan Anderson (en), un collègue du MIT. À cette époque les investisseurs n'étaient pas favorables aux sociétés informatiques. Ils commencèrent donc par construire des petits modules numériques (correspondant aux composants du TX-2) pouvant être combinés pour être utilisés dans un laboratoire. En 1961 la société était bénéficiaire et commença la construction de son premier ordinateur: le PDP-1. Durant les années 1960 DEC produit une série d'ordinateurs ayant un meilleur rapport prix/performances que ceux d'IBM, généralement basés sur des mots de 18 bits. Le succès arriva en 1964 avec le PDP-8. Il s'agissait d'un ordinateur 12 bits vendu environ 16 000 $. Le PDP-8 était assez petit pour tenir sur un chariot. Il était assez simple d'usage pour de nombreuses applications et conquit de nombreux marchés de niche, laboratoires, chemins de fer et applications industrielles. Le PDP-8 est aujourd'hui considéré comme le premier mini-ordinateur. Le dernier ordinateur marquant de la série PDP est le PDP-11. Il utilisait des mots de 16 bits pour supporter les caractères ASCII devenus standards. Il avait 64 kilooctets de RAM. Il est notamment connu pour avoir été l'ordinateur sur lequel UNIX et le langage C ont été développés. En 1976, DEC conçut une nouvelle architecture 32 bits et joue un rôle capital dans le lancement d'une course aux machines moins coûteuses, plus maniables et plus puissantes, face au monopole IBM. Elle fut introduite en 1978 par le VAX 11/780 et s'empara rapidement du marché des mini-ordinateurs. Les VAX pouvaient être utilisés avec le système d'exploitation UNIX ou VMS de DEC. Le succès commercial de DEC culmina vers la fin des années 1980. C'était le second plus grand constructeur d'ordinateurs et comptait 100 000 employés. À ce moment DEC proposait de nombreux produits propriétaires comme le réseau DECnet. Comme ces produits n'étaient conçus pour fonctionner qu'avec des produits DEC, les consommateurs se tournèrent vers des produits plus standards. Au même moment les performances des stations de travail RISC rejoignaient celles des VAX. Malheureusement Ken Olsen ne crut pas en l'avenir de l'informatique individuelle et Digital manqua le virage du PC.

The PA-7300LC The First "System on a Chip" Presented at Microprocessor Forum on 10/16/95 by Tom Meyer The PA-7300LC is a new processor design, which features a high level of integration of system functions. HP's PA-RISC processor family currently features two "streams" of CPU development. Each is optimized to meet the needs of different classes of computer systems. The high-end stream, which includes the PA-7200 and PA-8000 chips, is optimized for very high performance, highly expandable power desktops and servers. Several years ago it was determined that HP could best meet the needs of higher volume, more cost sensitive products by developing a different set of CPUs tuned to the special requirements of these systems. This processor line began with the PA-7100LC, which first began shipping in January of 1994, and continues with the new design described in this paper. We refer to this as our "low end" but it is also a "no compromise" stream, since we consider cost, performance, power, and other design objectives to all be equally high priority. Meeting the design objectives by finding the right balance between these factors is the main challenge in this area of microprocessor design. Design Objectives The design objectives of the PA-7300LC chip are nearly identical to those of its predecessor, which has proven to be a successful volume work-horse processor. Design improvements and a more advanced VLSI technology have allowed the designers to achieve roughly twice the performance of the 100MHz PA-7100LC without compromising cost or any of the other objectives. Like previous PA-RISC chips, the team evaluated the cost of design tradeoffs using a holistic approach which emphasizes total system cost, rather than just trying to design a cheap microprocessor without regard to the rest of the system. In defining the PA-7300LC HP's design team carefully considered the requirements of realistic system applications and tuned the design to meet those needs rather than just optimizing for microprocessor-level benchmarks. As a result, a large part of the design effort focused on minimizing the number of system components, reducing test and diagnostic costs, and getting the right level of functional partitioning. System designers and manufacturing engineers were consulted throughout the design. As you will see, many chip level features have been included to address these objectives. PA-7300LC Overview This design features a superscalar processor core that was highly leveraged from the PA-7100LC core. Enhancements include a large on-chip primary cache, an integrated DRAM and L2 cache controller, and an improved I/O bus controller. The chip uses established technologies including HP's half micron CMOS process and a low-cost ceramic pin-grid array package. The preliminary performance projections you see here assume 1 Mbyte of secondary cache and 60ns fast-page-mode DRAMs, but the chip can be configured with higher performance memory components. We believe that this processor will do very well on memory intensive programs as shown by the SPEC95 and OLTP estimates. This is because of the highly optimized memory hierarchy I will describe in a moment. PA-7300LC Chip Layout The RISC processor core, consisting of the integer units, floating-point unit, and instruction decode logic occupy the right side of the die. The center blocks contain the virtual memory translation lookaside buffer (TLB) and Memory and I/O controller or MIOC. The large, denser-looking blocks are the instruction and data caches. Nearly 8 million of the 9.2 million transistors are contained in these two blocks. As you can see, a large amount of chip real estate is devoted to embedded SRAM for the primary caches. It's been said that future microprocessors will look like large memory chips with a small microprocessor block in the corner. The 7300LC has really headed in that direction with this chip since the cache arrays occupy 40% of the chip area. As a si

Product Features: -Supports all standard 7mm/9.5mm 2.5 inch SATA I/II/III HDD and SSD up to 3TB(Max).  -Compatible Operating Systems: Windows 98 / 2000 / XP / Vista / 7 / 8 / 10, Linux, Mac OS 9.1/10.8.4 above.  -Tool-free installation; hot-swap plug and play; LED indicator; no reboot or additional driver needed;  -The slim and simple design of 2.5 inch hard drive enclosure, or support casing, can support any 7 and 9.5 millimeter 2.5 inch SATA HDD SSD. - 70% Faster than traditional USB 3.0 with UASP Transfer Protocol; which can accelerate read and write speed of SSD hard disk.  -Technical: We utilize the IS621 controller chip which implements SATA 3.0 enabling a top data transfer rate of 6 Gigabytes per second. Installation can be done without the use of any tools and hard drives and solid state drives install and dismount quickly. -The casing is made of ABS Engineering Plastic ensuring greater impact. Technical Parameters: -We utilize the JMS578 controller chip which implements SATA 3.0 a top data transfer rate of 6 Gigabytesper second. Installation can be done without the use of any tools and hard drives and solid state drives install and dismounted quickly. The casing is made of ABS Engineering Plastic ensuring greater impact resistance, strength, and stiffness. We employ plug and play technology that supports Windows XP, Windows Vista, Windows 7, Windows 8, Mac 9.1 and Mac 10.2. Specification: Color: Clear (As pictures) Material:  ABS Plastic Connector: Micro USB3.0 - B Package Content: 1 x 2.5" Hard Drive Enclosure 1 x USB 3.0 Cable Le 04-déc.-19 à 19:45:27 Paris, le vendeur a ajouté les informations suivantes:

Product Features: -Supports all standard 7mm/9.5mm 2.5 inch SATA I/II/III HDD and SSD up to 3TB(Max).  -Compatible Operating Systems: Windows 98 / 2000 / XP / Vista / 7 / 8 / 10, Linux, Mac OS 9.1/10.8.4 above.  -Tool-free installation; hot-swap plug and play; LED indicator; no reboot or additional driver needed;  -The slim and simple design of 2.5 inch hard drive enclosure, or support casing, can support any 7 and 9.5 millimeter 2.5 inch SATA HDD SSD. - 70% Faster than traditional USB 3.0 with UASP Transfer Protocol; which can accelerate read and write speed of SSD hard disk.  -Technical: We utilize the IS621 controller chip which implements SATA 3.0 enabling a top data transfer rate of 6 Gigabytes per second. Installation can be done without the use of any tools and hard drives and solid state drives install and dismount quickly. -The casing is made of ABS Engineering Plastic ensuring greater impact. Technical Parameters: -We utilize the JMS578 controller chip which implements SATA 3.0 a top data transfer rate of 6 Gigabytesper second. Installation can be done without the use of any tools and hard drives and solid state drives install and dismounted quickly. The casing is made of ABS Engineering Plastic ensuring greater impact resistance, strength, and stiffness. We employ plug and play technology that supports Windows XP, Windows Vista, Windows 7, Windows 8, Mac 9.1 and Mac 10.2. Specification: Color: Clear (As pictures) Material:  ABS Plastic Connector: Micro USB3.0 - B Package Content: 1 x 2.5" Hard Drive Enclosure 1 x USB 3.0 Cable   Le 07-janv.-20 à 19:27:31 Paris, le vendeur a ajouté les informations suivantes:

NEC U321Hi-MT Ultra Short Throw Projector UST Multi-Touch 1080P 3D FullHD 3200 ANSI Lumen Wall Mount included Worldwide shipping This ultra-short throw interactive projector releases space within small to medium sized classrooms and meeting rooms, projecting onto screen sizes between 85-100” without creating shadow or glare, allowing users to get up close in comfort to interact using the Multi-Touch function.   With 1080p resolution and 10.000:1 contrast, the U321Hi Multi-Touch delivers perfect image quality for very detailed content as well as high quality movies including 3D content from Blu-Ray players, thanks to HDMI 3D support. Demanding applications in higher education such as design and engineering will appreciate the 1080p resolution for the high level of detail achieved. Benefits - Great picture quality – thanks to 1080p resolution and 10000:1 contrast. - Almost no shadow and glare – thanks to ultra-short throwing distance. - Wall-mount included – for quick and easy installation, compatible with height adjustable systems. - Future-proof connectivity – incl. MHL and network support. - Cost effective replacement – of existing NEC UM Series installations to achieve higher resolutions without re-positioning of the existing wall-mount. - Multi-Touch Interactivity – 255 touch points and auto-calibration. - 3D ready – for playback of engaging 3D applications and movies. Product Information Product Name U321Hi (Multi-Touch) Product Group Interactive Multi-Touch Projector Order Code 60003945 Image Projection Technology 1-chip DLP™ Technology Native Resolution 1920 x 1080 (FULL-HD) Aspect Ratio 16:9 Contrast Ratio 1 10000:1 Brightness 1 3200 ANSI Lumen (approx. 85% in Eco Mode) Lamp 260 W AC (220 W AC Eco Mode) Lamp Life [hrs] 3000 (4000 Eco Mode) Lens F= 2.4, f= 3.72 mm Lens Offset [%] 65 Projection Angle [°] 57 Projection Factor 0.25: 1 Projection Distance [m] 0.195 – 0.306 Screen Size (diagonal) [cm] / [inch] Maximum: 254 / 100"; Minimum: 215 / 85" Zoom Digital Zoom Focus Adjustment Manual Supported Resolutions 1920 x 1080 (HDTV 1080i/60; HDTV 1080i/50); 1680 x 1050 (WSXGA+); 1600 x 1200 (UXGA); 1600 x 900 (WXGA++); 1440 x 900 (WXGA+); 1400 x 1050 (SXGA+); 1366 x 768 (WXGA); 1360 x 768 (WXGA); 1280 x 1024 (SXGA); 1280 x 1024 (MAC 23"); 1280 x 960 (SXGA); 1280 x 800 (WXGA); 1280 x 768 (WXGA); 1280 x 720 (HDTV 720p); 1152 x 870 (MAC 21"); 1152 x 864 (XGA); 1024 x 768 (XGA); 832 x 624 (MAC 16"); 800 x 600 (SVGA); 720 x 576 SDTV 480p/480i; 720 x 480 SDTV 576p/576i; 640 x 480 (VGA/MAC 13") Frequency Horizontal: 15–100 kHz (RGB: 24 kHz– 100 kHz); Vertical: 50 – 120 Hz Connectivity RGB (analog) Input: 1 x Mini D-sub 15-pin, compatible to component (YPbPr) Output: 1 x Mini D-sub 15 pin Digital Input: 1 x HDMI™ (Deep Color, Lip sync); 1 x HDMI™ with MHL support Video Input: 1 x RCA Audio Input: 1 x 3.5 mm Stereo Mini Jack; 1 x RCA Stereo Output: 1 x 3.5 mm Stereo Mini Jack (variable) Control Input: 1 x D-Sub 9 pin (RS-232) (male) LAN 1 x RJ45 USB 1 x Mini USB; 1 x Type A (USB 2.0 high speed) Video Signals NTSC; NTSC 3.58; NTSC 4.43; PAL; PAL-M; PAL-N; PAL60; SECAM Remote Control Remote Control Aspect Ratio; Audio Control; Auto Adjust; AV Mute; Digital Zoom; Direct Source Select; Freeze; Help Eco Mode; Help-function; ID set; Picture Adjust; Presentation and Mouse Control Electrical Power Supply 100-240 V AC; 50 - 60 Hz Power Consumption [W] 312 (Normal) / 264 (Eco) / 2.2 (Network Stand-by) / 0.3 (Stand-by) Mechanical Dimensions (W x H x D) [mm] 383

Souris sans fil, avec adaptateur usb en très bon état. Envoi soigné et sécurisé. --------------------------------- TECKNET M002 2.4G Classic Wireless Mouse - 4800 DPI -6 Adjustment Levels - Nano USB wireless receiver - Grey Product Features - TeckNet TruWave technology: Provides precise, smart cursor control over many surface types. TeckNet CoLink technology: After pairing there's no need to re-establish pairing after a signal loss or shutdown. - TeckNet 2.4G Wireless Gaming Technology: Experience zero delay between your thoughts and actions with gaming-grade 2.4GHz wireless, an increased working distance of up to 50ft/15m. - 30-Month Long Battery Life and Features a battery level indicator: Go longer between battery changes thanks to TeckNet 4-Level energy efficient engineering. With Auto power-off function, On/Off switch, Smart sleep mode and battery life indicator. - Ultra-Durable Build (8-million-click): TeckNet Classic mouse is built to handle torturous conditions thanks to primary TeckNet M-switches rated to a 8-million-click lifespan. - Compatible with most systems including Windows 2000, 2003, XP, Vista, Win7, Win8, Win10, Mac, Linux