GZSHUNLI Style:HDD Type:External Hard drive speed: 5400rpm Hard drive size: 2.5 inches Size: 11.3CM x 7.8CM x 1.4CM Memory capacity: 640GB Cache capacity: 8MB Interface: USB 3.0 material: ABS Colour: Black Application:Desktop,Laptop,Server,Monitoring Package Contents: 1 x Mobile hard drive 1 x data cable 1 x English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.