The heat and smoke detector KD-111 adopts the latest international used componentsand technology, it can detect both smoke and heat. The detector can be widelyused at home, office, and other commercial regions. If there is any smoke or certainheat temperature before the fire spreads, the detector will sound to informyou to take necessary action to protect your life and property. producing area:China payment:30% advance payment, 70% balance by T/T before shipment