Curious about how this performs in practice? Join us for a hands-on look at the JS-802A 12V 3A uninterrupted power supply paired with an EM lock access control kit. In this video, we demonstrate the magnetic lock opening and closing test, showing real-time operation, the 0-10s time relay adjustment, and how the built-in UPS keeps the system running during a power outage. A practical walkthrough for access control professionals.