RevJams Xec On Ear HD Wireless Bluetooth Stereo Headphones with In-line Microphone, White RevJams Xec delivers HD sound wirelessly using Bluetooth 3.0 A2DP technology On Ear design with an adjustable headband insures a comfortable fit, while keeping the headphones li 31 ft wireless range, allows you to move freely away from your audio device without loosing connect Built in rechargeable battery offers 8 hours of talk/music play time