... .3cm(Approx)Three colors for selection: Black, Blue, Red. RF carrier:2402MHz-2480MHzRF operation channel:16,auto frequency hoppingRated voltage ... included)4 keys (left, right, scroll, resolution option)Superior wireless optical sensor.For home or office use.Specification: 2.4GHz digital ... check battery power and replace it as necessary.The mouse will shut off automatically and enter sleeping mode for ...