) Size::32*21.5*3.5cm
2) Material: Plastics
3) Packing:Gift box (English,Chinese,Japanese)
4) Port: USB
5) Fun:Oil impregnated bearing
6) Fun speed:1800-3000
7) Noise: 23 db
8) Colour:shape of marble (art oil spray)
9) Convenient reliable and comfortable to carry
10) No need for any installation
11) Compatible with any notebook computers