The Bluetooth Headphones KB- 3800 allows you to enjoy digital- quality music wirelessly and convert between music and phone calling mode freely and by the click of a button. Features: Bluetooth stereo headset with mic. Anti- sweat padding. 3D Stereo sound. Folding design. Ultra low power consumption. Supports Bluetooth stereo devices to receive music from laptop, P.C,tablets, iPhone, blackberry, Android and or any device that supports Bluetooth stereo audio. Adjustable headset with soft padded ear cups. Specifications: Type: Bluetooth V4.1 Operating distance: Up to 10m (free space) Standby time: 110 hrs Ear Pad Diameter: +/- 65mm