The Kensington Pro Fit™ Mid-Size Wireless Mouse provides users with clutter-free productivity for an office environment. It compliments mobile laptop usage for travel with a storable nano receiver. The ergonomic, right-handed design with a high-definition optical sensor offers precise and responsive control. The Pro Fit™ Mid-Size Wireless Mouse is built to last with a limited lifetime warranty. Ergonomic mid-size design matches natural hand curvature maximising comfort during prolonged use Soft rubber panels and contoured buttons maintain comfort and grip High definition optical sensor (1750 dpi) delivers smooth cursor control and precise tracking Secure 2.4Ghz wireless technology reduces risk of interference and is ideal for clutter-free office environments Clickable scroll wheel ideal for speeding through documents Back and forward web browser navigation reduces time required to complete web browser tasks Nano Wireless USB reciever stores inside mouse battery compartment when travelling, ideal for mobile professionals Reliable Plug & Play operation with USB connection Professional black and blue corporate finish complements Pro Fit™ keyboards Low battery indicator, to show when batteries need to be replaced On/off switch to conserve battery life Extended battery life up to 12 months