Brand new and high quality. Fortify Bluetooth V3.0, Bluetooth A2DP and get in touch with. Keys: Key(NEXT),Key(PREV), Swap, Multi-function Key. Charging voltage: Micro USB 5V Working present: 25-35mA Bluetooth A2DP Working range: 10m Output Energy: 2x20mW Frequency range: 2.401-2.480GHz Distortion factor: ¡Ü1% Frequency response: 20Hz-20KHz Working Time: Song/ HuaTong state 10 h SNR: S/N¡Ý95 Charging…