Wired Version 2.4GHz Three-button Vertical Mouse for Left-hand, Resolution: 1000DPI, 1200DPI, 1600DPI, Cable Length: 1.7m (Black) Features: 1. USB interface, plug and play 2. Ergonomic, arc shape fits the palm, suitable for left hand 3. Special counterweight design stabilizes operation by centering the weight in the palm 4. Precise and sensitive optical engine for accurate positioning 5. Advanced high-frequency optical positioning technology with resolutions of 1000-1200-1600 DPI, enabling steady use on various surfaces 6. Quiet wheel scrolls smoothly with quick and accurate response, allowing effective scrolling of pages, tables, photos, etc. 7. Keys have a mechanical and electrical lifespan of over 5 million clicks Product parameters: 1. Size: 7x12x6cm 2. Weight: 87g 3. Operating distance: 10m 4. Number of keys: 3 5. Compatible with: Windows ME, 2000, XP, VISTA, Windows 7, Linux 2.4, Mac 6. Cable length: 1.7m