Cellink BTM-5961 has been designed to be compact and portable with the goal of eliminating bothersome cables and maximize working space anytime anywhere. It's one of the smartest wireless solutions using the latest Bluetooth technology with optical precision. The ergonomic design fits both right and left hands. The Bluetooth charger may act as a Bluetooth dongle and a battery charger. The unique design allows the user to move the mouse and charger together while charging.