IO Crest SY-ADA23012 USB Bluetooth 2.0 EDR dongle for $0.10

Compliant with USB 2.0 Full-Speed (12Mbps) specification. Bluetooth 2.0 EDR (Enhance Data Rate) compliant, 3 times faster than Bluetooth 1.2. Bluetooth Class 2 mode: Operating Range up to 10 meters. Enhanced wireless audio quality and reduced power consumption. Supports Bluetooth data transfer. Add Bluetooth functionality to personal computer. Supports Networking, Dial-up, Fax, Printer, Mouse, Keyboard, Cell phone. Supports Windows XP, Vista, and 7