2x 5.25" to 3x 3.5" 2.5" 12Gb/s HDD SSD Hot-swap Rack Stylish aluminum color handle and heat-sink body Support Hot-Swap & RAID Configuration (need an additional RAID controller) Aluminum Design with Conductive Dissipation Grooves Power, fan and high temperature LED indicators High Performance Transfer Rate up to 12Gb/s Supports Both 2.5" and 3.5" SAS I/II/III & SATA I/II/III HDD/SSD Equipped with Fan Speed Control Switch 14TB Hard Drives Compatible Product Introduction Create more space for hard drive with hot-swap capability, BPU-230HD series supports RAID 1/0/1+0/5 configuration for high performance or redundancy data application. Aluminum construction provides light weight but strong stability and extra 70mm fan keep hard drive at maximum performance. High density multi-disk storage backplane that allows multiple 3x3.5" SAS/SATA hard drives to be mounted into 2 standard 5.25". Aluminum construction provides best heat dissipation required for high performance SAS/SATA drives, is designed with excellent front to back vent airflow. Applications: Digital Audio Editing,Video Editing (SD or HD),Security System,SOHO SMEs With Limit HDD Tray and Data Protection or Disk-to-Disk Backup