1、Dual Ports: Hard disk enclosure provides 2 ports USB 3.0 and controls the power on/off of the two bays. 2、LED Indicator: Dual bay hard drive bracket has LED indicators for power supply and drive activity, and supports 50,000 hot swap cycles. 3、Easy to Use: HDD enclosure does not require drivers or software, plug and play, very convenient and quick to use. 4、Excellent Material: 3.5inch hard disk enclosure is made of aluminum and stainless steel, sturdy, shockproof design, and reliable. 5、Professional Design: The pull/push rod design can easily insert and eject HDD and SSD. It supports 3.5in HDD with different thickness and 2.5in SSD/HDD with 7‑9.5mm thickness. Item Type: Hard Disk Enclosure Material: Aluminum,Stainless Steel Model: ST7224U Support Drive Size: 2.5in State Drive,Hard Disk; 3.5in Hard Disk Compatible Drive Type: SATA Number of Drives: 2 Maximum Drive Height: 1 x 2.5in Up to 9.5mm + 1 x 3.5in Up to 26.1mm Drive Bay: 5.25 Inch Drive Bay Transfer Rate: SATA 6Gbps (Depending on Hard Disk Speed) Support Hard Disk Capacity: Unlimited Hot Swap: Support Host Interface: 2 x SATA 7pin Power Input: 1 x 15pin SATA Power Interface Drive Safety: Triangular Key Slot Drive Activity LED Indication: Drive Power: Blue; Hard Disk Access: Flashing Blue Support Operating System: For Windows 98,for ME,for 2000,for XP,for Vista,for 7,for 8,for 10 Sever 2008 1 x User Manual 4 x Screw 1 x Hard Drive Bays 2 x Key( Bunches) 1 x SATA Power Cord 2 x SATA 7P Cable