J-MALL Universal HV-800 Wireless Music A2DP Stereo Bluetooth Headset Universal Vibration Neckband Style Headset Earphone Headphone For cellphones such as iPhone, Nokia, HTC, Samsung, LG, Moto, PC, iPad, PSP and so on & enabled Bluetooth-Black Brand new and high quality. Support Bluetooth V3.0, Bluetooth A2DP and call. Keys: Key(NEXT),Key(PREV), Switch, Multi-function Key. Charging voltage: Micro USB 5V Working current: 25-35mA Bluetooth A2DP Working range: 10m Output power: 2x20mW Frequency range: 2.401-2.480GHz Distortion factor: 1% Frequency response: 20Hz-20KHz Working Time: Music/ HuaTong state 10 h SNR: S/N95 Charging Time: 2h-3h Talk time: 8-15 hours, play time: 6-10 hours Music Playing Time: up to 10 hours Frequency Response: 20 ~ 20000Hz Sensitivity: 80dB