The Black Vortex MB074SP-1B is a hot-swappable 4 bay 3.5inch SATA HDD cooler cage built robust from durable metal. It has many configurable options such as fan speed control, fan LED brightness control and power button for each of the drive bay. The hot swap function and EZ-Grip handles give you the ability to swap drives without breaking a sweat. The quiet 120mm cool blue LED fan combined with all metal ventilated design keep your drives cool, lowering your overall system temperature and thus increasing your hard drives life span. The removable dust cover prevents dirt and dust from entering the case. The Black Vortex MB074SP-1B is a must-have HDD cooler cage for any PC builder seeking quality components with a ton of features and rugged good looks.