Specification: 
 

1) Convenient for right hand or left hand users
2) Radio frequency and optical technology
3) Freely 360-degree use within 1.5m radius
4) Automatically power-saving sleeping function
5) Zoom in / out functions
6) All injection colors available
7) High resolution: 800dpi 2500frames/s
8) Working on any surface except glass
9) Compatible with Win 95 / 98 / 2000 / Me / XP / NT/VISTA

10)Product dimension: 81*50*31mm, N.W.: 105G

White box packing information: 

SIZE: 48*43*27.5  G.W./N.W.: 12.5/11.5KGS/CTN  QTY: 100PCS/CTN