Keyboard : 2.4 wireless keyboard working distance 10m 78keys Windows XP/VISTA 32/64-bit/WIN 7/8 /mac net weight 317g battery included Optical wireless mouse : Optical sensor Perfect ergonomic design 1000 dpi Precision tracking 3 buttons & scrolling wheel Windows XP/VISTA 32/64-bit/WIN 7/8 /mac 32/63-bit compatible working distance 10m button life 3000000times top cover design with glossy coating size 10x5.8x3.8cm nano reciever net weight 57g battery included