Li polymer

REMAX RB-200HB Wireless Bluetooth4.1 Headphone Headset Sport Studio HIFI Bass Resonance Stereo for iPhone and Android Phones   Feature: 1.Classical leather ear pad Improve the comfort of the pressure ear. 2.Fold to Convenient storage. 3. 4.1V lossless transmission 4.3D Sound for your ear   Specification: Bluetooth version: bluetooth V4.1 Effective transmission range: 10m Battery: 300mAh Li polymer battery Charging time: 2.5hours(maxmum) Playing time: 10hours Stand-by time: up to 30 days LED indicator status: Blue LES for power and BT pairing indicator; red LED for charging indicator Diameter of driver unit: 40mm Frequency range: 20Hz-20kHz Sensitivity at 1KHz: 110+_5dB Impedance: 32+_15% Distortion rate: Rated power input: 10mW Net weight: Approx.160g   Accessories: USB charging cable 3.5mm audio cable Instruction manual