IOGEAR GBMH211W6 - Wireless Bluetooth Stereo Headphones with Built-In Microphone Maximum wireless range up to 33 feet (10 meters) Supports MP3-quality stereo sound (frequency response 20Hz - 20 KHz) Works with Bluetooth mobile phones and allows you to pick up incoming calls even during music playback Integrated headphone control buttons give you quick access to play/pause, track selection, and volume control Alerts you of incoming calls from your Bluetooth mobile phone even while you listen to music