Dual 3.5" / 2.5" Hard drive dock allows you to hot-swap laptop and desktop hard drives in a breeze. Cloning function works independent from computer connection, meaning you can clone a hard drive without even needing a computer! Great for lab benches and high-volume cloning environments such as schools and offices. With lightning-fast eSATA and USB 3.0 Connection interfaces, quickly share files between hard drives and computer systems without ever needing to physically open a computer!