RAPOO S100 Bluetooth 4.1 Headphone HiFi Stereo Headset with MIC Function Key                       Specifications:  The main parameters<br> Product type: headset<br> Frequency response range: 20-20000 hz<br> products Impedance: f 32 ohms，<br> 110 db sensitivity<br> Headphones plug: USB interface<br>  <br> Function parameters<br> Support bluetooth specification<br> Bluetooth bluetooth version: 4.1<br> Number of connections: can connect the two devices at the same time<br> Micro USB interface: charging interface<br> battery type: Lithium battery，<br>  BATTERY<br> Battery capacity:450 mah<br> Charging time:3 hours<br> Battery life: 20 hours<br>  <br> The microphone parameters<br> Carrier frequency:2402 MHZ to 2480 MHZ<br> Transmission distance:360  ， 10 m<br>  <br> The other parameters<br> color: black， red， blue， white<br> size: 158.1 * 67 * 169.1 mm<br> Other features keys function: open the key， the volume plus\/minus， call control， suspension， a\/the next song<br> System support: Windows PC with bluetooth functions， Mac computers， tablet computers， mobile phones<br> Other performance， wired\/wireless two ways to choose<br> Support the multipoint connection<br> Support no signal automatic shutdown error correction<br>  <br> Package included:<br> Bluetooth headset x1， packing list<br> Micro USB charging line x1<br> Decorative covers the x1<br> Quick start guide x1