Compatibility: This 4 bay external hard drive docking station is compatible with all 2.5 and 3.5 inch SATA HDD and SSD. Support Read and Write 4 piece of drivers at the same time, and quick read on HDD and SSD. 5Gbps Transfer Speed: This hard drive duplicator is capable of 5Gbps transfer speed, 20% faster than the traditional USB 3.0, and backward compatible with USB2.0 and USB1.1. 72TB Capacity: Support storage expansion up to 72TB (4X 18TB hard drives), perfect solution for backup and processing IT data, batch processing data, formatting, file transfers, data recovery, gaming data backup, etc. Offline Cloner: This hard drive duplicator clones datas from a source hard drive to target disk without connecting to a computer, can be used as external storage for transfering datas between a hard drive and your computer. Hot Swap works great. Independent Power Supply: Highly efficient 12V/7A DC power supply offers a stable and reliable power supply.