... .OEM is welcomed 27MHz mini wireless mouse, computer accessories, nice business gifts2.4GHz USB Optical Wireless Mouse For PC/LaptopPackage Contents:Mouse, Nano-receiver , Battery, ... to remove it the receiver stores inside the mouse.2.You get a powerful ,reliavle connection,with virtually no delays or ... .3.An on/off switch helps conserve power.and a smart sleep model extends battery life.4.Between the ...