The X8100 set is the more than worthy successor of the bestselling X1800 This wireless combo comprising a keyboard & optical mouse transmits using the proven 24 GHz standard which offers a range of up to 10 m while providing 360° coverage In addition to sleek new design the keyboard was upgraded with six multimedia keys & the high-performance 1000 DPI optical sensor offers you smooth & accurate mouse-pointer control while the symmetrical design allows for ambidextrous use Reliable 24 GHz wireless connection Up to 10m range & 360° coverage Sealed anti-oxidation membrane Multimedia hotkeys High resolution 1000 DPI sensor Ambidextrous design Nano USB (Universal Serial Bus) receiver Up to 12 months battery life"