Medium-sized, wireless 1000 dpi optical mouse for right-handed users with small hands Wireless 2.4 GHz USB receiver for uninterrupted operation Plug and play operation 5 buttons for even more user efficiency Requires 2× AA batteries (included) Compatible with Windows 7, Windows Vista, Windows XP & Mac OS X Available in 4 metallic colours: red, blue, green and grey Colour: graphite grey