Logitech Wireless Mouse Keyboard Set Wireless Wireless Combo MK270 [M185 + K270]

ship from Japan Body size Keyboard (width x depth x height): 450 mm x 155 mm x 18 mm Body weight keyboard (including batteries): 470g OS: Windows XPWindows VistaWindows 7Windows 8Windows RT Operating distance: 10m Batteries used (keyboard): AAA dry batteries x 2 Wireless method: Advance 2.4GHz (Unifying compatible)