Item Type: Wireless Keyboard Mouse Receiver: Nano Size: (Approx.)Keyboard Dimension: 430x155x25mm; Mouse Dimension: 120x60x25mm Signal.2.4GHZ Interface: Wireless, RF 2.4 G Mouse Button: DPI DPI: 1000-1200DPI Frequency: 2402MHz - 2480MHz Keyboard Power Supply: 2 x AAA batteries (not include) Mouse Power Supply: 2 x AAA batteries (not include) Suitable scope: Desktops and Laptops Compatible with: Windows 98/2000/XP/ Vista /Win7/ Win8/Mac operating system, etc.