BlueFox Extreme Universal Bluetooth Stereo Headset - Back Wrap Universal Bluetooth stereo headset Back wrap style Can be synced with any Bluetooth enabled device including cellular phones, Mac & PC Features max 4x noise canceling technology Built-in microphone & convenient multifunction buttons to answer/end calls, raise/lower volume & switch between music playback Supports remote control of play/fast forward, rewind, volume up and down 7 Hrs. Music Playback 8 Hrs. Talk Time 100 Hrs. Standby Time Max 4X Noise Cancelling Technology