Bornd M510 Water Resistant Wireless Keyboard & Mouse Combo (Black) Type: 2.4GHz Optical Wireless Mouse Buttons:6 (left, right, scroll, DPI key and two multimedia keys) Mouse Operation Range: 30-Feet Resolutions: 1000/ 1500/ 2000 DPI Keyboard: 2.4GHz Multimedia Wireless Keyboard, 14 Multimedia Hot Keys Compatibility: Windows 98/ 2000/ XP/ ME/ VISTA/ Win7/ Mac OS