The top left portion of the front bezel features a series of 6 LED indicators for Power, Fan Fail and an additional 4 for independent hard disk access. In order to use this feature, users must have a compliant motherboard or RAID array. As a security precaution, the YY-0221B incorporates a locking mechanism for the front door to easily prevent access to any devices which may reside in the 5.25" bays. This is an expected feature amongst server grade cases although easily contradicted, as I will point out late in this review. A single set of keys are included with the YY-0221B.