The Bluetooth V4.2 Stereo Headphones BT1602 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. -Noise Reduction. -3D Stereo sound. -Travel Friendly Folding design. -Adjustable headset with soft padded earcups. -Rechargeable battery via included USB. -Supports bluetooth stereo devices to receive music from laptop, P.C.,tablets, iphone, blackberry, Android and or any device that supports bluetooth stereo audio. Specifications: -Type: Bluetooth V4.2 -Frequency Response: 20Hz - 20kHz -Frequency Range: 2.4Ghz - 2.48Ghz -Operating distance: Up to 10m (free space) -Standby time: 110 hrs -Ear Pad Diameter: +/- 80mm