CM0093 Battery 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. Special weight design makes the center of gravity designed in the palm, running more smoothly 4. Accurate and sensitive optical engine, sensitive and accurate optical positioning 5. Adopting advanced, high-frequency optical positioning technology, the resolution is 1000-1200-1600DPI, allowing you to use it steadily and freely on desktops other than glass, as you like 6. The scroll wheel rolls without noise, the paragraph feels soft, the response is quick and accurate, and the screen can be effectively scrolled up and down, and web pages, data tables, photos, etc. can be easily browsed and edited 7. The mechanical life and electrical life of the buttons are more than 5 million times Product parameters: 1. Size: 7x12x6cm 2. Weight: 87g 3. Operating distance: 10m 4. Number of buttons: 3 keys Note: Batteries need to be purchased separately