1. Brand new and high quality
2. Material: ABS
3. Comfortable hand touch
4. Move freely in 10 meter's area
5. Working distance: 10 metres
6. Need 2*AAA alkaline batteries to support(not included)
7. Designed for notebook/pc users
8. Compatible with Windows me / 2000 / XP / Vista / windows7 Operating system
9. Changeable resolution: 800/1200/1600 dpi
10. Key's life: Over 1,000,000 times
11. Elegant and ergonomic design, Built-in energy saving system
12. Scroll up and down directly without moving your hands
13. Cover with mouse ON/OFF function
