Specifications:<br>  Specifications of Bluetooth:<br> 1.Bluetooth version: 3.0+EDR<br> 2.Operating distance: 10m<br> 3.Range of frequency: 2.4 to 2.4835GHz ISM band<br>  Specifications of Headphone:<br> 1.Type: Stereo headphone with Mic<br> 2.Speaker: &amp;Phi;10mm<br> 3.Sensitivity: 115dB S.P.L at 1 KHZ<br> 4.Impedance: 32&amp;Omega;<br> 5.Frenquency response: 20Hz-20KHz<br> 6.Rated power: 2x20mW<br> 7.Rechargeable lithium battery: 100mAh<br> 8.Talk time: Up to 5 hours<br>    Music playtime: Up to 4 hours<br>    Standby time : 120 hours<br> 9.Compatible for iPhone\/HTC\/Samsung and other Bluetooth devices<br> 10.Color: Black，White，Red，Blue  Features:<br>  1.Support pairing Bluetooth devices to play music<br> 2.Hands-free call function， built-in high sensitive microphones<br> 3.If not connected Bluetooth mode， it will turn off automatically after 8 minutes<br> 4.Built-in rechargeable lithium battery， environment protection， economical and pratical<br>  <br> Bluetooth pairing instructions:<br>  Long press the call button 3 seconds to boot， the blue light lighted， it is the state of the<br> Bluetooth pairing. At this time search the corresponding Bluetooth device name on the phone， click<br> the device name on the mobile phone for the Bluetooth pairing， hear &amp;quot;ding dong&amp;quot; means the pairing<br> is successful， the indicator lamp flash twice every five seconds.<br>  <br> Package included:<br>  1 x Bluetooth headset<br> 1 x USB charging cable<br> 1 x User manual