Style:Wired Product Description Mouse, Corded, Optical, Number of Buttons 2, Black, Cable Length 26-1/2 In. , Connector Type USB, Compatible With PC/MAC(R), Height 3-3/4 In. , Length 4 In. , Width 2-1/4 In. , Features Retractable From the Manufacturer Comfort and reliability are critical in any office environment. And the Kensington Pro Fit USB Wired Mid-Size Mouse delivers both. The mid-sized right-handed design feels great in the hand while the wired plug-and-play connectivity delivers high reliability and zero setup. Kensington Pro Fit USB Wired Mid-Size Mouse comes with free technical support. Learn more about the the Pro Fit series of mice in the comparison grid below. Pro Fit 2.4 GHz Wireless Full-Size Mouse Pro Fit 2.4 GHz Wireless Mid-Size Mouse Pro Fit USB Wired Full-Size Mouse Pro Fit USB Wired Mid-Size Mouse Pro Fit Retractable Mobile Mouse Model Number K72342US K72354US K72343US K72355US K72339US Connection WirelessUSB WirelessUSB WiredUSB WiredUSB WiredUSB Size Full-size Mid-size Full-size Mid-size Small Internet Forward & Back Buttons Comfortable Right-Handed Design Retractable USB Cable