A4Tech Ergonomic USB Travel Mouse 1000 DPI Symmetrical Dust Free D-110-1

General Information Innovative HoleLESS EngineEquipped with Dual Optic Lens (2P) Allows Mouse to Increase 54 Times Higher Image Contrast than Regular Mouse, and "Dust-Lid" Filters Out Undesired Light, Keeping Dust Liquid Out. Guaranteed HD Precision, Always!Pointing Device Pointing Device Connectivity Technology: Cable Pointing Device Cable Length: 196.85 ft Movement Detection: HoleLESS Engine Movement Resolution: 1000 dpi Number of Total Buttons: 3 Scroller Type: Tilt Wheel Pointing Device Features: Water Proof Pointing Device Features: Dust Proof Pointing Device Features: Comfort Grip Ergonomic Fit: Symmetrical Interfaces/Ports Pointing Device Host Interface: USB Physical Characteristics Color: Black Height: 0.9" Width: 2.2" Depth: 3.8" Weight (Approximate): 1.87 oz Miscellaneous Certifications & Standards: CE FCC Green Compliant: Yes Green Compliance Certificate/Authority: WEEE Country of Origin: China