Acoustic Research ARWH2 2.4 GHz Mini-Bridge Stereo Headset (Silver) Sends PC audio content wirelessly to clip on mini bridge with headphones and built in microphone and has 3 hour battery life Omni directional interference free 2.4 GHZ digital USB 2.0 transmitter with 30 foot broadcast range Seamlessly switch from enjoying audio or video to making or taking VoIP calls High fidelity uncompressed digital audio in a lightweight portable and simple to use unit Comes with USB transmitter and stereo earbuds with carrying case and requires Windows XP or Windows Vista and USB port