The u261-001-bt4 mini bluetooth 4.0 (class 1) usb adapter connects to your computer or laptop's usb port to provide instant bluetooth wireless capability. ideal for wireless communication with bluetooth 4.0-enabled smartphones, tablets, keyboards, mice, headsets and printers, this low-profile device protrudes less than 3/16 of an inch (5 mm) from the usb port, so it can remain connected while your laptop is inside a sleeve, briefcase or backpack.the u261-001-bt4 has a wireless range of 164 feet (50 meters) and supports data transfer rates up to 3 mbps. you can connect up to seven bluetooth devices at the same time. it requires very little power to function, and its built-in security ensures your pairing, encryption and authentication remains private. it's also backward compatible with previous bluetooth versions. just plug the u261-001-bt4 into your windows® or linux computer or laptop, and the driver automatically installs.