DAYTECH Wireless Smoke Detector Photoelectric Sensitive Sensor Fire Detector Fire Alarm Fire Protection Come With 9V Battery SM20

DAYTECH Independent Smoke Detector Sensor Portable Fire Alarm Sensor Battery Operation 4 PCSProduct Function DescriptionThe working principle is that the particles in the smoke can reflect infrared light. Infrared diode placed in a special chamber, the chamber can shield external light, but does not affect the smoke into.It can reacts very quick to visible smoke released by smoldering fire and flaming fire, and suitable for fire alarm in house, factories, shopping malls, restaurants, office buildings, banks, libraries, etc.Main features:Attractive and modern design suitable for residential and commercial applicationsDustproof,mothproof,anti-light interference designSuperior detection sensitivity,MCU processing,eliminate false alarmMore than 1 year battery life (according to the battery type) and easy battery replacementSound&flash once a fire sensed(smoke, low battery)Loud (85db) alarm sound at 3m (10ft)Simple wall or ceiling installation, with bracketPACKAGE LIST:4Independent Smoke Detector Sensor4 6F22 carbon battery