While PS3 and Wii wireless controllers use Bluetooth for connectivity (and can be used with Bluetooth-equipped computers with appropriate software), Xbox 360 wireless accessories communicate over a proprietary 2.4 GHz protocol. In order to accommodate this, Microsoft released the Wireless Gaming Receiver (sold as "Crossfire Wireless Gaming Receiver" in the UK), which allows wireless Xbox 360 accessories to be used on a Windows-based PC. Most Xbox 360 wireless accessories are supported, including standard controllers, racing wheels (without force-feedback), headsets and guitar controllers. The adapter was first revealed at E3 2006 and released on February 16, 2007.