High quality aluminium Disk Enclosure with totally silent operation. The newly designed Aluminium enclosure acts as a built-in heatsink, effectively reducing heat output of the enclosed Hard Disk to enhance reliability and lifespan. Fully Plug n' Play for leading Operating Systems including Microsoft Windows and MAC OS X, the USB-HD2.5S allows your existing 2.5" SATA Hard Disk to be fitted quickly and with minimal effort.