CM0093 Rechargeable Version 2.4GHz Three-button Wireless Optical Mouse Vertical Mouse for Left-hand, Resolution: 1000DPI 1200DPI 1600DPI(Black) Features: 1. USB interface, plug and play 2. Ergonomic, arc shape fits the palm, suitable for left hand 3. The special counterweight design makes the center of gravity design in the palm of the hand, which makes the operation more stable 4. Precise and sensitive optical engine, sensitive and precise optical positioning 5. Adopt advanced and high-frequency optical positioning technology, with a resolution of 1000-1200-1600 DPI, allowing you to use it on desktops other than glass steadily and freely 6. The wheel scrolls without noise, the paragraph feels soft, the reaction is quick and accurate, and it can effectively scroll the screen up and down, easily browse and edit web pages, data tables, photos, etc. 7. The mechanical life and electrical life of the keys are more than 5 million times Product parameters: 1. Size: 7x12x6cm 2. Weight: 87g 3. Operating distance: 10m 4. Number of keys: 3 keys 5. System: Windows ME 2000 XP VISTA Windows 7 Linux 2.4 Mac