A separate module is no longer necessary for this option. Key Override is standard on all LLKM10K models. However, it is optional to utilize, so it can be added with little effort at a later date if necessary. Key Override allows a key to “override” the access control device only. It will not override the combination lock. This capability is particularly important during the event of power outage, failure or malfunction of an access control device, or an emergency that requires expedited entry