Modern, flat design with gentle, quiet and durable wear-resistant keys. Universal, reliable and optimised for professional use. Flat, wireless keyboard including cursor and number pad Whisper keystroke keys with wear-resistant laser key legends Up to 10 million keystrokes 4 hotkeys (calculator, e-mail, browser, sleep mode) Plug & Play via USB connection 3-button mouse, for both left-handed and right-handed operation Optical sensor technology (1, 200 dpi) Battery status display in keyboard and mouse Interference-free wireless 2. 4 GHz technology (range of up to 10 meters) Nano USB receiver