5-bay 3.5" HDD Enclosure with 12Gb/s SAS & SATA BackplaneSK33502 is designed with standard mounting holes for converting 3 x 5.25" drive bays into 5 x 3.5" SATA hot-swap hard drive bays.- Fits chassis with three 5.25" drive bays- Back-mounted 80mm fan to deliver optimized cooling performance- Two front access USB ports- HDD failure and activity indicators on each hot-swap drive carrier- Supports inrush current control for drive hot-swapping- Alternative HDD activity and failure single input sources- Built-in temperature sensor and overheat warning system