Features:

1) Convenient for right hand or left hand users

2) Radio frequency 27MHz and optical technology

3) Mini USBreceiver built-in

4) 2AAAbatteries, battery saving switch providing longer battery life

5) 3 buttons with scrolling wheel

6) Freely 360-degree use within 1.5m radius

7) Automatically power-saving sleeping function

8) Zoom in/out functions

9) All injection colors available

10) High resolution: 800dpi

11) Working on any surface except glass

12) Compatible with Win 95/98/2000/ME/XP/NT