Features: Occupy standard 5.25" empty slot, support one 2.5 inch HDD/SSD and one 3.5 inch HDD. SATA interface, the theoretical transmission speed up to 6Gbps, support hot plug. Tool-free design, easy to install and remove the hard disk. Adopt safety triangle lock to protect hard disk safety. 2 external USB ports on front panel, easy to connect U disk, mobile hard disk and other USB devices. Equipped with independent power switch and LED indicator light to monitor hard disk read and write status at any time. Specification: Material: Aluminum alloy+Stainless steel Hard disk slot: 1*2.5 inch HDD/SSD+1*3.5 inch HDD Compatible hard disk type: SATA Max transfer rate: SATA 6Gbps Applicable space: 5.25 inch drive bay USB port: 2*USB3.0 Host interface: 2*SATA 7Pin Power interface: 1*SATA 15Pin power connector Item size: 19.5 * 14.9 * 4.2cm /7.68 * 5.87 * 1.65in Packing list: 1 * Internal hard disk enclosure 1 * SATA power cable 2 * SATA data cable 4 * Key 4 * Screw 1 * User manual Note: The product does not contain hard disk.