Macally RF mouse is a cordless optical mouse that gives you the freedom without a cable. Its 5 fully programmable buttons and internet scroll make it the most versatile mouse on the market.MODEL- RFMOUSE VENDOR- MACALLY FEATURES- Wireless Optical rfMouse- Mac version Wireless freedom with no mouse cord and Optical technology with no mouse ball or moving parts to clean. 5 fully programmable buttons and a comfortable ergonomic design. Includes USB mouse receiver 2 AA alkaline batteries driver software CD and manual. -- SPECIFICATIONs ------------------------------------INTERFACE- USB 1.1 REQUIRES - Any desktop or notebook computer with an available USB port 15MB free hard drive space CD-ROM drive 2 AA alkaline batteries (included) rfMouse driver software (included) MacOS 9 or later