Hercules Smoke Detector (Assorted Types)TSS380A-HThe SafeHome TSS380A is a battery operated smoke detector which utilises a photoelectric sensor. Photoelectric technology allows the detector to be more sensitive to detecting slow smoldering fires which generate thick black smoke and little heat.The smoke detector has a battery life up to ten years.This battery is non-replaceable.When low on battery, the smoke detector produces an alarm as a reminder.TSS910CHercules Smoke DetectorModel TSS910CLifespan 5 Years batteryPhotoelectric Technology3 Year Limited Smoke Detector WarrantyEnd of life warningEasy installation by drilling, or using stick on magnetSmoke Detector is compliant with EN Standards 14604, and is an LPCB approved product.