Battery Version Wireless Mouse Vertical 2.4GHz Optical Mouse 1. Vertical streamlined design, combined with ergonomics, naturally fits the palm of the hand, reducing the discomfort of long-term use of the mouse. 2. The forward and back buttons below the left thumb of the mouse speed up navigation and help you navigate easily. 3.800-1200-1600 DPI Free adjustment, one button to meet your different needs. 4. Applicable battery: 2 7th batteries (not included), 6 months long standby, avoid frequent battery replacement problems. 5. The appearance of the mouse is made of matte material, and the grip is comfortable. 6. The bottom anti-slip design makes it easier to use. Specification: 1. Corresponding interface: USB interface. 2. Transmission distance: 10m. 3. Size: 123 x 65 x 82mm. 4. Number of buttons: 5.