Lenovo Wireless Mouse. The Lenovo Wireless Mouse N30B is a three-button wireless mouse with a nano dongle. It lets you enjoy free control without a cable. There is no need to remove the dongle when moving the system. The operation range is above 4 meters in order to maximize your freedom. Lenovo Wireless Mouse N30B comes with an optical sensor, which provides smoother, more precise movement. All of these advantages are powered by two AAA batteries, which can last approximately three months.