Smoke/ Heat/ Flame Detector use photoelectric technology to detect smoke [not heat] and continually monitor their own sensitivity and operational status. The Detector can be placed up to 2000 feet away from the base unit depending on objects and structures in-between the smoke detector and the base unit. The Detector is made using quality grade raw material which ensures optimum durability along with long lasting trouble free service. Smoke/ Heat/ Flame Detector is strong and rigid in construction and requires minimal maintenance.