Feature:100% Brand New and High quality,,Transmission range: 10 meters,Function: music, voice control, multi point connection,Bluetooth protocol: 4.1,Channel: stereo,,Standard: glasses cloth *1, USB data line *1, information *1, host *1, glasses box *1,,Technical parameter:,1: operating frequency 2.4GHZ-2.480MHZ,1: meet the Bluetooth V4.1 standard,2: wireless connection range: 10 meters,3: transmit power: Glass2,4: support for Profiles Headset&Handsfree,5: built-in rechargeable lithium battery 150mAH: headset,6: headset call time: 6 hours standby time: 150 hours,7: the weight is only 50g, suitable for a long time to wear not fatigue;