Usage time make 4 hours This headset has the 500mAh battery to provide electronic power, also enjoy music that has almost 100 songs, The important part to incorporate to offer good call quality and use the IOS and HUAWEI helper Clear and rich listening sound Through using the Bluetooth version 4.2, provide the most stable connection, and transmit the signal over 15m distance without problem. This version 4.2 can ensure clear and rich sound to user. the ecology design First, in pads, have the different size (S / M / L) to match some people's ears. Second, the design be novelty, The best use to do the sport, finally, be comfortable when wearing a headset for travel. Service Attention Thank you for being interested in our product, offering multiple service, such as Spanish, English, French, German, Italian.