Low price bluetooth headset (ot-b11) 1: bluetooth v1.2 compliant; 2: adopting csr bluetooth solutions; 3: radio characteristics: bluetooth tx power class ii 4: frequency: 2.402 ghz - 2.480ghz 5: channels: 79 6: the longest standby time: 200 hours; 7: the longest talk time: 6 hours; 8: rechargeable li-polymer battery; 9: working range: indoor 5 metres, outdoor 10 metres; 10: simple touch call reject, call waiting, voice dialing. 11: adjustable volume control key; 12: blue/red led indication for bluetooth access and power on/off; 13: well suited to both the right ear and the left ear; 14: light and balanced weight design offers wearing comfort; 15: keep user away from electromagnetic wave of mobile phone Packing: neuter, oem Weight: 18g