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Card scan door locks.
Key card key fob biometric finger print retina scan and etc or pin based access control systems provide you the ability to lock and unlock doors.
Once the reader recognizes the access credential it then communicates with the door lock.
With a good system the whole process takes less than a second.
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The smart access control reader will be wired to an electric lock on your door and it will send a signal to the lock to start an unlock event.
How does the reader communicate with the door lock.
Many organizations utilize technology cards for employee badges to track and authorize access to restricted areas.
Card lock company got its start serving veterans clubs after wwii and has since expanded into other fraternal organizations healthcare and manufacturing using products solely.