Feature:1. 4 Bay Expansion: The 4 Bay HDD cage is installed in a standard chassis 2.5in drive tray and supports four 2.5in hard drives at the same time2. Scope of Application: The SSD mobile rack is compatible with 15mm thick hard drives and SSDs, suitable for IT professionals3. Quiet Fan: The HDD mobile rack has a built in long lasting silent fan, which greatly increases the efficiency and service life of the hard disk4. Indicator Light: The 4 Bay 2.5in HDD cage has LED hard disk power on and data signal indicators to keep abreast of hard disk running status5. Guard Function: The 4 Bay SSD cage built in circuit security technology, 9 kinds of composite safety data circuit guard design, multiple protections such as overcurrent, overvoltage, leakage, etc6. Plug and Play: The HDD mobile rack has a humanized hard disk tray structure design, which can be installed and removed with one push and one pull, plug and playSpecification:Item Type: 4 Bay HDD CageMaterial: Aluminum Alloy, Engineering PlasticSupported Capacity: 3TB(Maximum Supported Capacity,Not Inclube Hard Disk,No capacity)Transmission Speed: 6GbpsSupport Hard Disk: 2.5in Hard Disk, 15mm Thickness Laptop Hard Disk, Hard Disk, SSDSupport System: For Win, for Win XP, for Win Vista, for Win7, for Win8.x, for Win10, for OS10x, for LinuxIndicator Light:Green: HDD StatusRed: Hard Drive Storage.Package List:1 x 4 Bay HDD Cage4 x Cables16 x Hard Drive Screws6 x Hard Drive Cage Screws1 x User Manual