Motor driven Alarm Bell 6′ Diameter 90dB volume Suitable for conventional and addressable alarm systems Fire resistant material red colour tested to operate for 40 hours continuously Yun Yang Address. FIP YFR-1 Yun Yang Conventional Fire Alarm Control Panel YF-1 5 Zone Yun Yang Conventional Fixed Temperature Heat Detector Yun Yang Conventional Photoelectric Smoke Detector Yun Yang Conventional Rate of Rise (RoR) Heat Detector