12V DC Gas Alarm Detector Propane Butane Sensor Wireless Leakage For Home Security System Quickly Accurate

12v Smoke Detector for Alarm Systems

CHZHVAN Smoke Alarms for Home, 10-Year Battery Fire Alarms Test/Silence Button Smoke Detector with LED Indicator Conforms to EN 14604 Standard,Fire Detector for Kitchen, Caravan, Office 2 Pack