The features that matter most in your office are comfort and reliability. And the Kensington Pro Fit™ 2.4 GHz Wireless Full-Size Mouse delivers with plenty of both. The full-sized right-handed design feels great in the hand while the 2.4GHz wireless technology is ideal for crowded office environments. Ergonomic design matches natural hand curvature maximising comfort during prolonged use Requires 2 x AA batteries (included) PC and Mac® compatible High definition optical sensor delivers smooth cursor control and precise tracking Adjustable dpi settings for smooth cursor control and precise tracking (800, 1200, 1600 dpi) Secure 2.4Ghz wireless technology reduces risk of interference and is ideal for office environments Dedicated, thumb controlled, back and forward web browser navigation reduces time required to complete web browser tasks 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 Professional black and blue corporate finish complements Pro Fit™ keyboards