YJK3518, 2 slots for 2.5'' and 3.5'' to read and copy, it has dual copy function, you can operate it offline. Support hot swap. chip PL2773, with USB3.0 to two SATA slots,  transfer rate can be 5Gbps. Dual clone function can copy your disk1 to disk2, at the same time disk2 to disk 1. So this powerful device is best-seller at Europe.
size:149*127*76mm,
suit: data line,
authentication power adapter 12V3A,
neutral package,
screws and screw driver,
specification card,
logo and color can be required.