9528U3 2-bay 3.5" SATA HDD enclosure, support 8TB*2=16TB, USB3.0 transfer rate up to 5Gbps, High Grade Aluminum Alloy and High quality Plastic for its material, Tool free, support hot-swap, intelligent sleep, 12V4A power adapter, JMS 551 chip, Super silent cooling fan, LED lights indicating the working status