With the valtage monitoring circuit of Ctek original reation, to protect the HDD and the eletrical switch not harm from over high or over low valtage, and avoid to run the HDD while plug in the power. At the bottom there are shockproof and skidproof cilica gel strip, with the One button backup function. Full PCB, HDD and PCB are fixed together. To encrypt and decrypt the byte by using the special high speed encryption chip, It will appear that the HDD has not been formated, or can not read new HDD, if you dismantle the HDD or read the data forcibly without the decryption of the chip. In-line PIN, one key can only match one HDD, it is a great helper to protect your files and messages. Interface: Mini USB2.0 Materials: Aluminium magnesium alloy. Color: Silver, black, blue and red. Description: High speed USB2.0 interface Data W/R speed up to 480Mbps Support 2.5" IDE & SATA HDD Support HDD max capacity up to 120GB USB power supply. Driver for windows 98se and Mac OS, other operating system no need the driver Support hardware: IBM compatibles, laptops, Apple computers. Operating system: Windows 98se/2000/ME/XP ISTA\Mac OS 9.0 or more advanced operating system such as Linux 9.0 Kernel 2.4.20-8