Features:

High-precision optical trackball.
Never needs cleaning.
LED roller shines the status of trackball movements.
Supports Windows 98/2000/Me/NT/XP.
With the optical technology,the motion canbe detected on most surfaces,including wood plastic,paint,etc.

Specification:
Buttons 3 buttons with scrolling wheel
Connector PS/2,USB,U+P
Performance optical sensor
Resolution: 400dpi or 800dpi
Working voltage: 5V
Working current: 50-60mA
Stand-by Current: 17-30mA
Color option: pearl white,yellow, blue ect
Cable: 1.5m
EMI & Safety FCC, CE
Mouse Size 90(L)X45(W)X35(H)mm
Packing Dimension Gift box:137(L)X118(W)X60(H)mm N.W.: 1.65 kg
Carton:560(L)X288(W)X266(H)mm G.W.: 5.9 kg
40pcs/CTN
Capacity of Container 20 feet: 25600pcs
40 feet: 51200pcs