Notice For our HDD Case/hard drive enclosure, it does not include the hard drive,only Case. Dear Customer Suppose you bought 2139C3-G2, however, it says 2139C3 on the box. Dont worry, the product you received is right The reason is Although 2139C3 and 2139C3-G2 are different products, their shells are the same. Therefore, whether it is 2139C3 or 2139C3-G2, the silk screen on the product is 2139C3. There are 3 models available,please choose suitable model according to your needs: 1.2139U3 USB3.0 Model Max 5Gbps transfer rate, comes with a 50cm Micro B to USB 3.0 cable. 2.2139C3 USB-C Model Max 6Gbps transfer rate, comes with a 50cm Type C to USB 3.0 cable. 3.2139C3-G2 USB-C 10Gbps Model Max 10Gbps transfer rate, comes with a 50cm Type C to Type-C cable and Type-C to USB 3.0 cable. Product Feature(Reuse Old PC Hard Drive) *Support 4TB high-capacity hard drive. *Supports all standard 7mm/9.5mm 2.5 inch SATA I/II/III HDD and SSD up to 4TB(Max). *Smart Auto Sleep Mode: Features 10-min Auto Sleep Mode to let your HDD or SSD stop spinning to have a rest. Good to extend the lifespan of the hard drives. *Super Speed USB 3.1 has a maximum data transfer rate of 10Gbps, 10 times faster than USB 2.0. Backward compatible with USB 2.0 or 1.1 ports. What's in the box 2139U3/2139C3: 1 x ORICO USB3.0 to SATA III Hard Drive Enclosure 1 x Cable 1 x User Manual 1 x Service Card 2139C3-G2: 1 x ORICO USB3.1 to SATA III Hard Drive Enclosure 2 x Cable 1 x User Manual 1 x Service Card Everything is under control 2139C3 is made of transparent ASB fireproof material with blue LED indicator, LED indicator lets you learn the working status of this External Hard Drive Enclosure easily,and being the beautiful ornament on your desktop. USB3.1 Gen2 Type-C to SATA3.0 10 Gbps transmiion USB3.1 Gen2 Type-C's theoretical transfer rate is up to 10 Gbps; SATA3.0's theoretical velocity reaches up to 10 Gbps, setting aside more time to do what else you want. Support UASP protocol New UASP protocol improves transfer speed, reduce the utilization of CPU, data delay and waiting time. Tool free installation, easy to use Wide Compatibility Any standard 2.5" SSD HDD (7.5mm~9mm) should work , for ordinary SATA port connector Put old 2.5 inch hard drive into hard drive enclosure to be your mobile database, renewing old notebook hard drives. 2139U3/2139C3/2139C3-G2 New upgrade design