The Kensington Pro Fit(R) Mid-Size Wireless Mouse provides users with clutter-free productivity for a desktop PC. And it complements 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. Compact size for travel convenience Clutter-free wireless technology and storable nano receiver Ergonomic right-handed design 2. 4 GHz wireless for long range with minimal interference Scroll wheel with middle button and pointer speed quick-select High-definition optical sensor (1750 DPI) for responsive control Extended battery life up to 12 months Built to last with a limited lifetime warranty