1)Hat shaped optical mouse.
2)Optical:PSII/USB/Combo
3) 1200dpi
4) Compatible with Windows95/98/2000/XP/NT
5)Ergonomic engineering designing, suitable for either right-handed or left-handed person.

Packing information:

MEAS: 50*43.5*27.5CM G.W./N.W.: 11.5KGS/10.5KGS QYT: 100PCS/CNT