Product Features: • Support 4 x 2.5 ” and 3.5 ” SATA / SAS hard drive or SSD into a 3 x 5.25 ” device bay with no capacity limitation • Support 7 ~ 15mm thickness of 2.5 -inch SATA HDD / SSD • Support SATA 3 6.0G bps transfer rate • LED light indicators for temperature, power and HDD access • Hot-Swappable • Removable tray to easy and quick installation • Metal Construction for quick heat dissipation • Built-in adjustable speed 80mm cooling fan • Security lock to keep the drives secure in the enclosure Package Content • HT31-304 x 1 • SATA Cable x 4 • 4 Pin Cable x 1 • User Manual x 1 • Key x 1 • Screws for 3.5 -inch HDD x 16 • Screws for 2.5 -inch HDD x 12 • Screws for the device x 4