Add bluetooth 40 capabilities to a laptop or desktop computer through usb the usbbt2edr4 class 2 usb bluetooth 40 adapter lets you add bluetooth wireless capabilities to a laptop or desktop computer through usb with support for transfer distances of up to 10m 33ft this bluetooth adapter is based on the well established broadcom 20702 chip offering reliable throughput and packet loss concealment plc technology which reduces errors dropped connections and improves audio performance