The Bluetooth Stereo Headphones MS-991 allows you to enjoy digital-quality music wirelessly and convert between the music and phone callling mode freely. Features: -Hinge construction headband, folding option. -Bluetooth stereo headset with mic. -Supports bluetooth stereo devices to receive music from laptop, P.C.,tablets, iphone, blackberry, or any device that supports bluetooth stereo audio. -Adjustable headset with soft padded earcups. -Compatible with iOS and Android. Specifications: Type: Bluetooth Frequency Response: 12-22.000Hz Sensitivity: 108 db Impedance: 32 Ohms Ear Pad Diameter: +/- 70mm