ABUS Smoke Detector Test Spray 125mlA test spray used to check if your smoke alarm is working correctly. This is suitable for use on photoelectric smoke alarms and is free from chlorine, fluorine, CHC CFC, PCB, lead or other noxious substances. For use on photoelectronic smoke detectors Used to check if the smoke detector is working Free of chlorine, fluorine, CHC CFC, PCB, lead or other noxious substances