The MB981U3S-1S multi interface allows universal adaptability with various PCs or Macs, whether they are newest Macbook with lighting fast USB 3.0 interface, or your 2 year old desktop PC with eSATA interface or even with a 90s computer with a USB 2.0 interface, they are all covered by MB981U3S-1S. The MB981U3S-1S uses tool-less plug & play design for both 2.5" & 3.5" SATA hard disk and solid state drives - simply slide in the drive and power on the device and play. This is an excellent solution for using a hard drive without the hassle of installation and allows you quickly swap drives just seconds. 2.5" drives can be used on the go being powered by the USB bus, while 3.5" drives utilize a small form factor wall power supply that can be easily stowed away in a laptop bag or briefcase. The 2 part anti-dust cover on the top is divided into 2 pieces, so that if a 2.5" drive is inserted, only the smaller portion of the cover opens up, leaving the electronics inside safe from dust and debris. Other useful elements include a power button on the dock that double as status LEDs, a easy to press, large drive eject button, and as always, a ICY DOCK 3 year warranty.