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
