3-button mouse, for both left-handed and right-handed operation Nano USB receiver GS approval Optical sensor technology (1,200 dpi) Battery status indicator on mouse Almost interference-free wireless 2.4 GHz technology (range of up to approx. 33 ft.) Operation for several mice (multi-station capability) Plug & Play via USB connection MW 2400 Wireless Mouse 1 x Battery (Type AA) Manual 1 x Nano-USB Receiver