Dual Wireless Mouse provides multiple pairing options connect to a laptop or mobile smart device via Bluetooth 3. 0 or 5. 0 (Bluetooth LE) to save a valuable USB port, or to a desktop PC via the 2. 4GHz USB-A Nano dongle. The high-performance optical sensor tracks quickly and accurately on even the most difficult modern office surfaces, including glass, granite, lacquer, marble and wood.