M030 4 Keys 1600DPI Laptop Office Mute Mouse, Style: Wireless (Black) 1. Lightweight and portable, comfortable and quiet 2. Ergonomics, smooth and round shape, not tired after long time use 3. The mouse button adopts a delicate matte surface treatment process, which makes the hand feel comfortable 4. Automatic sleep, intelligent power saving design 5. The optical engine is responsive, and the control is smooth, and it is easy to move quickly and accurately locate without losing frames 6. Interface: USB 7. Material: ABS 8. Photoelectric resolution: 1600dpi 9. Number of keys: 4 keys 10. Working method: photoelectric 11. Operating distance: 20 meters 12. Wheel direction: two-way wheel 13. Wireless transmission frequency: 2.4GHz 14. Battery capacity: 500mah 15. Power supply mode: USB charging built-in lithium battery 16. Working power: about 0.6w 17. Working voltage: 3.7v 18. Working current: less than 15mA 19. Input voltage: 5v 20. Input current: 30mA 21. Input power: 1.5w 22. Dimensions: 108 x 60 x 26mm 23. Weight: 60g