HP 2.4 GHz Wireless Optical Mobile Mouse - Luminous Rose The micro-receiver is so small you can store it inside the mouse Advanced 2.4GHz wireless technology for less interference and longer range of operation to work further away Optical sensor with adjustable sensitivity (1250 CPI default, 1750 CPI max) works on many surfaces Rubber sides and symmetric design provide comfortable and secure grip for left or right hand use Compatible across all notebook and desktop platforms; System Requirements: Available USB port; Microsoft Windows /XP/Vista/7