Whisper keystroke keys with wear-resistant laser key legends. Flat, wireless keyboard including cursor & number pad. Up to 10 million keystrokes. 4 hotkeys (calculator/e-mail, browser/sleep mode). Plug & Play via USB (Universal Serial Bus) connection. 3-button mouse, for both left-handed & right-handed operation. Optical sensor technology (1, 200 dpi). Battery status display in keyboard & mouse. Interference-free wireless 2.4 GHz technology (range of up to. 10 meters). Operation of several desktops (multi-station capability). Nano USB (Universal Serial Bus) receiver. GS approval.