1. Set on the finger, wireless operation, convenient and practical
2. Lightweight and portable, healthy and labor-saving
3. USB interface charging, convenient and fast, long use time
4. Resolution: 1000DPI
5. Wireless frequency band: 2.4G Mhz
6. Battery capacity: 3.7V 180mAh
7. Charging interface: USB
8. Charging time: about 2h
9. Use time: about 15h
10. Use distance: about 10-12m
11. Support system: XP/WIN7/8, etc.
12. Material: ABS
13. Weight: about 25g
14. Size: about 6 x 4 x 3.8cm