) Size: 30.8x26.8x25 cm 2) Material: Metal 3) Packing: Gift box (English) 4) Port: USB 5) Fun: Oil impregnated bearing 6) Fun speed: 1800-3000 5) Noise: 23 db 6) Colour: silver 7) Convenient reliable and comfortable to carry 8) No need for any installation 9) Compatible with any notebook computers