UGREEN  (50857) USB 3.0 to SATA Dual-Bay Hard Drive Docking Station
Interfaces: SATA III to USB 3.0 B
Transfer Speed: 5Gbps
Max HDD Capacity: 2 x 12TB.
Safe & Fast
Computer-less Hard Drive Cloner: The hard drive duplicator offers two SATA III 15pin connections and enables to dock two drives over USB 3.0 for easy access or clone a SATA drive without a host connection. Perfect for migrating data from older drive to a new one, making an entire disk duplication to keep data integrity and safety, upgrading hard disk, recovering data standalone, transferring OS from HDD to SSD easier. And LED indicators let you learn the cloning process easily. 
Lightning Data Transmission Rate: Base on the test results in Ugreen lab, this USB 3.0 hard drive docking station can transfer 1G files in seconds. The dock is built with SATA-III 6Gbps and USB 3.0 5Gbps connection that supports UASP accelerated transmission protocol and performs a 70% faster read speed and 40% faster write speed than conventional USB 3.0. With JMS561U chipset and 12V 3A power supply, fast and steady data transmission rate is ensured. 
24TB Capacity Supported & Tool-free Installation :Due to dual bay design, this USB 3.0 caddy supports two HDD, SSD, SSHD drives simultaneously up to 24TB, like Crucial BX500,Samsung 860 EVO,WD Red. Plug & play and without a need for a driver and tool installation. Fully compatible with computer operating systems like MacOS, Windows 10/8.1/8/7/XP/Vista, Linux, Chrome, PS4 Pro, PS3, Xbox One, Smart TV, Router, OTG phones/ tablets etc.
Auto Sleep Mode & Better Heat Dissipation: The 3.5 inch hard drive enclosure will enter sleep mode when two drives are without operation in 15 mins. This design allows the drives to stop spinning and is good to extend their lifespan. The vertical in-line design makes the half of the hard drives exposed to the air. Good for heat dissipation and avoiding over-heat. It is much safer than closed case.