Fangrui Product Details 1. Y20 4 Keys Colorful Glow Charging Mute Mouse Notebook Game Wireless Mouse, Colour: 2.4g + Bluetooth (silver) 2. Features: 3. Optical Engine, Three-speed Dpi Speed Regulation, 800-1200-1600dpi Free Choice 4. Built-in 500 Mah Lithium Battery, Long Battery Life 5. The Connection Distance Is 15 Meters, Which Is More Convenient To Use 6. Colorful Lighting Effects, Beautiful And Practical 7. Dust-proof Roller, Sensitive And Not Stuck 8. Product Parameters: 9. Material: Abs, Electronic Components 10. Connection With Computer: Wireless 11. Photoelectric Resolution: 1600 (dpi) 12. Number Of Keys: 4 (keys) 13. Interface: Usb 14. Adjustable Resolution: Three Gears 15. Working Method: Photoelectric 16. Wheel Direction: Four-way Wheel 17. Wireless Transmission Frequency: 2.4ghz, Bluetooth 3.0, Bluetooth 5.1 18. Built-in Battery: 500 Mah Lithium Battery 19. Charging Time: 2 Hours 20. Battery Life: 60 Days 21. Dimensions: 11.3 X 5.7 X 2.5 Cm 22. Product Weight: About 66 Grams