Supports 4 SATA drives either 2.5" or 3.5" in size. Drives screw into tray and then slide into the enclosure. Door on the front is perforated to allow air flow through the case to cool the drives. There is an 80mm fan at the back of the enclosure to help airflow. The enclosure is also made of an aluminum alloy to dissipate heat and keep the drives cool.

This is a used unit in excellent, like new condition. I have upgraded to a larger enclosure.

Comes with:
Manufacturer information:
https://yottamaster.com/en-ca/products/yottamaster-4-bay-hard-drive-enclosure-with-cooling-fan?variant=40175407038582