Trendnet TBW-107UB

TRENDnet Bluetooth 2.1 Nano Style USB Adapter
The Micro Bluetooth USB Adapter (Model TBW-107UB) networks Bluetooth enabled devices such as cell phones, keyboards, and headsets. Slightly larger than the size of a penny, simply plug this micro-device into an available USB port on your laptop or desktop and experience exceptional Bluetooth connectivity.
Connect as many as 7 Bluetooth devices at distances of up to 10m (32.8ft). Enhanced Data Rate (EDR) technology transfers your data quickly. Adaptive Frequency Hopping (AFH) minimizes interference from other wireless devices and advanced wireless encryption protects your network.