... (not included)6 keys (left, right, scroll, page up, page down, resolution option)Superior wireless optical sensor.Use for ... 2.4GHz digital wireless transmission, operation distance is up to 10 meters.Built-in mouse memory, no ... the service life of one AA alkaline battery is up to six months.Intelligent connectivity, no need to ... used for a long time. To wake it up, press the right or left button.Never ...