Tool-free & Easy Installation. Unique Fan-less Silent Heat Dissipation Design. Two USB 2.0 Hi-speed Ports. HDD Shock-proof Mechanism. Supports All 3.5' PATA or sATA Hard Disk Drives up to 500G. MultiTRAK Technology provides transaction translator per USB port to ensure that hard disk and the other USB devices have best performance. Attractive Blue LED for power and red LED for HDD Activity. Stylish Anodized Aluminum Cover and Stand. Plug & Play and Hot-swappable. Compatible with both Windows and Mac OS