H:oter Premium Extreme Racing Optical Cordless Pc Mouse - Sports Car Shape Wireless mouse with small USB receiver Emulational Ferrari outlook makes it cool and fashionable Supprot Windows 2000/ 2003/ XP/ Vista/ 7 Mouse Size-10 cm*5.5 cm*3.5 cm(4*2.2*1.4) Batteries-2 AAA batteries(not included), the haedlights do not flash