1. General Conventional Fire Alarm Control Panel with four Zones 2. Specifications Two Style B (Class B) Initiating Device Circuits (IDCs). All zones accept two-wire smoke detectors and any normally-open contact devices. One built-in Fire Fighting Ouput. 24-volt operation. Resettable four-wire smoke detector power 500 mA. Non-resettable power 500 mA. One-man walk-test programmable for silent or audible test. Disable/Enable control per IDC. Reverse polarity protection. 3. Packaging and shipping Conventional Fire Alarm Control Panel with four Zones 1 pc/carton box;carton M:43*17*51cm