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The DM4-BLK is a heavy-duty, four-bay external hard drive enclosure manufactured by PacTec. It features a ruggedized hard plastic outer case, a lockable enclosure lid, and four sliding trays that can accommodate either 2.5” or 3.5” hard drives. The DM4-BLK is designed with an internal power supply and four SATA connection ports to provide constant power and data transfer with each tray. It supports up to six terabytes of total storage capability, features an LED indicator, and is capable of providing maximum data transfer speeds up to 6Gbps.