Awei A620BL Wireless Bluetooth4.0 Stereo In-ear Earphone Wireless Sports Headset - Red Type: In-Ear Input Impedance: 32ohms + / - 15pct Power Supply: Output Power 10mW Sensitivity: 90dB + / - 3dB Weight: 0.157 kg Operating Time: Working Hours 6hours for talking time, 4hours for playing music Stand-by Time 200hours Charging Time 1hour Package Contents: 1 x Bluetooth 4.0 Earphone ;1 x User Manual Parts: 6 months