Now you can have all the reliability of a wired mouse with none of the cable clutter. The Kensington Pro Fit Retractable Mobile Mouse instantly retracts its cord for travel and delivers complete comfort when you reach your destination.- Retractable USB cable stores inside mouse when not in use- Advanced Blue Optical sensor tracks on more surfaces than standard optical (1000dpi)- Clickable scroll wheel is ideal for speeding through documents- Sculpted side panels with soft rubber panels and contoured buttons maintain comfort and grip- Reliable Plug & Play operation with USB connection- Designed for durability withstanding everyday drops and spills- Wired 76cm cable for battery free reliable operation- Professional black and blue corporate finish complements Pro Fit keyboards- Compatible with Windows XP Windows Vista Mac OS X *