Transmission speed: USB3.0: theoretical speed 5 Sbps; USB2.0: theoretical speed 480Mbps Support system: for Win7/8/10/XP/Vista/for Os 10x Linux Product features: switch control of hard disk + dual USB interface LED indicator: (blue) power light; (red) signal and backup progress light Name:MR-6203-Two-disk optical drive hard disk extraction box Placement:On the desktop 5.25 optical drive position Support hard disk:2.5/3.5SATA1/2/3 hard disk/SSD solid state hard disk Size:19.9cm x 14.5cm x 4.2cm Mainboard cable:cable length:37.5cm Colour:Black Material:Metal+Plastic Package Contents: 1 * Hard Disk Enclosure 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.