Specifications: Support hard disk: M.2 SATA (B-KEY/B&M-KEY) Product disk position: dual disk position Product features: one to one hard drive offline to copy; data transfer Operating system: for Windows XP/7/8/10, for MacOS Support Capacity: Single Disk Supports 2TB,Total Capacity 4TB support 2230/2242/2260/2280/22110 M.2 hard drive Note: Not suitable NVMe standard SSD Input: 5V 2A Output: 5V 2A Two types of applications: 1.Mobile hard drive case: When using, please first plug the hard drive socket (A disk port or disk port) of this product into the M.2 SSD hard drive (support 2230/2242/2260/2280 M.2 hard drive); turn on the power, the power input port is plugged into the DC power port of this product. Then connect the computer and the product with the USB cable, the USB A port is plugged into the computer and the other end is plugged into the Type-C port of this product. 2.Offline copy: Please operate without connecting to the computer, you must insert the AB two disks, the total capacity of the A disk is less than the B disk; turn on the power, long press the copy button for 3s, if the copy progress indicator appears flashing at the same time, then click the offline copy switch again, if 25% of the indicator begins to flash it means that the copy from the A disk to the B disk, when the copy is complete, the four indicators are fully lit, turn off the power, unplug the hard disk When the copy is complete, all four lights will be on, turn off the power and unplug the hard drive. Notice: 1）Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. 2）Please allow 1-3CM differs due to manual measurement. Package Include: 1* SATA Docking Station Duplicator