Alxum Aluminum USB 3.0 SATA Hard Drive Docking Station, allows you to easily insert desktop two 2.5" or 3.5" SATA Hard Drives, saves hours to swap hard drives or duplicate a hard drive, takes advantage of UASP (USB Attached SCSI Protocol) for SuperSpeed transfer files up to 6Gbps. Apple-style Design USB Hard Drive Dock with Solid Aluminum body could extended product life, helps the lightening heat radiate from the HDD and SSD, which protect your Serial ATA (SATA) or SATA II Hard Drives. Offline Clone Function The Dual Bay Hard Drive Docking station supports a standalone offline clone function, easily lets you duplicate or clone 2 Hard Drives without a computer host, or can be connected to a computer system for use as an external hard drive dock.  - Plugin 2 hard drives, and identify Original Disk and Target Disk. - Connect power supply then switch on the power. - Easily press the "Clone" button, then offline clone will start. Features: - Hard Disk connect to PC, write and read of up to 405 MB/s Offline Clone without PC, write and read of up to 485 MB/s - LED light indicates Power and Activity status - Entering sleep mode without operation in 30 minutes Support Windows XP / Vista / 7 / 8 / 8.1 / 10 (32 / 64 bit), Mac OS 10.10 or higher, Linux Kindly Notes: - Target Disk must contain more space than Source Disk. (capacity: Source Disk＜Target Disk). - Any bad sectors on the drives in use may prevent duplicator and cause overheating, which is damages to the station. - Do not try to insert or withdraw HDD or SSD when another hard drive running. - Highly efficient 12V3A power supply guarantees a stable and reliable energy supply. Package Contents:  1 x USB 3.0 to SATA Aluminum Hard Drive Dock 1 x 3.9ft Data Cable 1 x 12V 3A Power Adaptor 1 x User Manual