Specifications Compatible with all the conventional fire alarm control panel 8mm Big Size LED Outside two holes provide 83mm(USA) Inner two holes provide 59mm(Europe) Wiring Terminals provided on the PCB board Description The device is remote LED uses a state-of-the-art designs. This LED is designed to be used with detectors. One 8mm LED provide local 360° visible alarm indication. They flash with the same as detector that be connected.