Description: 4x 3.5-inch serial port sata hard disk (no capacity limit), can be applied to security, monitoring, industrial computers, personal computers, enthusiasts, audio and video workers, servers and other large-capacity storage systems, multiple hard disk data storage and exchange use. For 4 x 3.5 inch SATA I / II / III hard drives, up to 3Gbps. Support SATA hard drive, not limited capacity, support SATA hot plug (Hot Swap) function (motherboard support). Free tools, free screw design, easy to quickly replace the hard drive, multi-function LED light, easy to understand the hard disk running status, Patented design, reduce the operation caused by vibration, increase the stability of the hard disk. LED lights indicate power and read status, equipped with hard disk power control switch, equipped with an anti-accident out of the hard disk lock, the use of more secure, with a back-blowing 60 x 60 x 10mm (active cooling) 2 silent fans. Package Includes: 1x SATA Cage 1x Key 4 Pieces SATA Cable