Adopt the latest Bluetooth technology with rock-solid transmission and compatibility with all Bluetooth devices. Unplug up to 10 meters of communication, enjoy wireless music and phone calls. Rechargeable lithium battery: this headset frees your hands while you're on the go – from biking to driving, you'll be able to remain linked. Supports HD and music/video replay. Track switching and volume changes are possible from the headphones. Folding structure, Easy to hold. Scalable design can fit different heads. With built-in FM radio feature, Micro SD card supports music listening, fast and simple. Wear easy hands-free calls allowing free contact.