Rapoo MV20 Ergonomic Wireless Silent Vertical Mouse 1. With an ergonomic angle of about 60 degrees, the arm is closer to a natural relaxed state 2. The spinnaker shape, the curve is round and full, plus the thumb groove on the side wing, the grip is comfortable 3. Reliable 2.4G wireless connection, stable signal transmission, 10m transmission distance 4. High-performance engine, multi-surface application 5. 3 levels of DPI, one-key switching to meet the accuracy needs of different screens 6. Vertical grip, easy office work 7. Photoelectric resolution: 1000 DPI 8. Interface: USB 9. Buttons: left button, middle button, right button, forward button, back button, DPI switch button 10. Transmission mode: wireless 2.4G 11. Features: mute button, durable, high-precision engine 12. Battery life: about 9 months 13. DPI: 80012001600 14. Working method: photoelectric 15. Power supply mode: 2 x AAA batteries (need to buy by yourself) 16. Packing list: mouse, receiver, battery, manual 17. Size: 7.6x11.7x6.9cm 18. Weight: about 90g