The Fanvil BT20 USB Bluetooth Dongle is a low-power, small form factor device that can be implemented within offices for connecting their IP phones to available Bluetooth headset | BT20, compatible with a variety of brands of Bluetooth headsets, users can answer / hang up the phone within the Bluetooth communication range | BT20 is Bluetooth specification V4.0, back compatible with Bluetooth 2.0, 2.1 and 3.0 for wide-ranging use | Compatible with the Fanvil X5S/X6 can support Bluetooth headset | Can the Answer/hang up calls via Bluetooth headset | HD Audio | 10m Range | High Transmission Rate | Plug and Play | Lower Power Consumption | Super Mini size, portable