The EL25 is beautifully engineered for private residences, yet fully adaptable for use in apartment buildings, condo complexes, office parks and commercial sites. Unmatched in its class, the EL25 is designed to easily manage 2,000 FLEX-CODES. And unlike other systems, the EL25 can be purchased as a standard unit or with optional plug-in modules. This lets you choose only the plug-in modules you need depending on the specifics of the job, and allows you to offer custom solutions right off the shelf without special orders