MECO(TM) 2.4GHz Wireless Keyboard And Numpad DPI Adjustable MouseKit with USB Receiver(Blue) USB Ver 1.1 or 2.0 port Package include: 1x 2.4GHz wireless keyboard 1x wireless mouse Color:Blue Power supply: 1.5V x 2AAA (not included) Compatible: Windows XP, MacOS, Windows Vista, Windows 7