SunBright Dual Bay 3.5" Enclosure is a simple device to expand your storage capacity to your computer. You can enjoy the combination of 2 units SATA I/II HDD up to 2TB (2 terabytes) in one enclosure. The function of J.B.O.D. or Individual mode allow users to select the preference of HDD capacity management. With the efficient way of cooling , the built-in powerful mini FAN and the front air filter keep your drive cool and anti-dust. The friendly USB 2.0 transmission ensures you the speedy performance anywhere.