The Icy Dock MB994SP - 4S Drive Bay Adapter is engineered for high - performance RAID applications, accommodating four 2.5" SATA or SAS hard drives or solid - state drives within a single external 5.25" bay. Constructed from heavy - duty metal, this adapter is built to withstand demanding environments, making it ideal for medical, military, and media server applications. It features Anti - Vibration Technology (AVT) to ensure a safe operating environment for your drives, while Active Power Technology (APT) optimizes power usage by activating the cooling fan and LED indicators only when drives are installed. The dual 40mm cooling fans and ventilation slots provide excellent airflow, keeping your drives cool during operation. The removable EZ - Slide Mini tray system allows for easy maintenance, and the Eagle - hook lock system secures drives within the enclosure. With a data transfer rate of up to 12 Gbit/s, the MB994SP - 4S is a reliable choice for those seeking efficient storage solutions.