Features 1.3 DPI Adjustable: Mouse can easily adjust the sensitivity of the mouse, 800, 1200, 1600 DPI three gears, using a high quality optical engine, can achieve faster response, smoother tracking and higher accuracy movement. 2.Rechargeable Mouse: The Rechargeable wireless mouse has a built in 110mAh lithium battery, which can easily charge the mouse via the included USB cable, no need to replace the battery. After a full charge of 3 hours, the wireless mouse can be used for about 30 days. 3.Professional Design: The vertical mouse allows you to keep your left hand in a normal holding position, avoiding wrist pain caused by prolonged use. Perfect for offices and home offices, designed for left handed users. 4.Wide Compatibility: Mouse works with PCs, Laptops and all devices with USB connection, no additional drivers required, plug and play. 5.Durable Design: The Wireless mouse supports up to 50 million clicks, giving you a premium feel better than a normal mouse. It features an elegant rubber matte finish that provides good grip while preventing fingerprints and smudges. Specification Item Type: Left Hand Vertical Mouse Material:ABS Battery Type: Built in 110mAh 302323 Lithium Battery (Ship with Inbuilt Battery) Use Distance: >15M Transmit Power: +5db Maximum Sensitivity: 800, 1200, 1600 DPI Adjustable in Three Levels System Requirements: For Windows 2000, for XP, for Vista, for CE, for win 7, for win10, for Linux, for Android Package List 1 x Mouse 1 x Charging Cable 1 x Adapter 1 x User Manual