The Yun Yang Electronic Strobe and sounder is a perfect combination device for areas that need both audible and visual warning. Power Input: 24v DC Sound Output: 96dBA at 1m / 100dBA Optimal Colour: Red ABFSTFS10A Yun Yang 24v 6″ Alarm Bell Yun Yang Fire Alarm Complex YUN YANG NEW GENERATION LED EMERGENCY LIGHTS Yun Yang New Generation Battery Operated Smoke Detector