?? Quality - Durable dual bay door with key lock and Patented non-scratch SATA connector with 50K insertion rate?? Simplicity - Patented pull/push bar designed for easy insertion and ejection of HDD and Tool-less design for HDD installation?? Led Indicator - LED light for power and HDD activity?? Easy to Install and Remove - No inner tray required?? Convenient u2013 Supports hot swap and Compatible with all types of PC cases