Each floor channel is equipped with high-stability relay modules, delivering quick signal output, strong anti-interference capability and long service lifespan. LED indicator lights on every board clearly display power status, network connection and relay triggering status for easy fault inspection and maintenance. Standard plug-in terminal blocks simplify wiring installation without complex soldering work. It matches access control readers, intercom systems and management software, widely used in apartments, office towers, shopping malls and staff dormitories. It effectively restricts users' accessible floors to strengthen building security, greatly improving the intelligence and management efficiency of property access control systems. Color: As Shown Material: ABS+Metal Package Contents: 1x40 Floors Elevator Control Board Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.