The Kensington Pro Fit 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.General Information Manufacturer: Kensington Computer Products Group Manufacturer Part Number: K72422AM Brand Name: Kensington Product Line: Pro Fit Product Name: Pro Fit Mid-Size Wireless Mouse Ruby Red Product Type: Mouse Pointing Device Pointing Device Connectivity Technology: Wireless Pointing Device Wireless Technology: Radio Frequency Wireless Operating Frequency: 2.40 GHz Movement Detection: Optical Movement Resolution (dpi): 1750 Scroller Type: Scroll Wheel Pointing Device Features: Ergonomic Ergonomic Fit: Right-handed Interfaces/Ports Pointing Device Host Interface: USB Battery Information Battery Included: Yes Physical Characteristics Color Family: Red Product Color: Ruby Red Weight (Approximate): 7.20 oz Miscellaneous Package Contents: Pro Fit Mid-Size Wireless Mouse Ruby RedNano USB ReceiverBatteries Device Supported: Computer Recycled: No Warranty Limited Warranty: Lifetime