85dB Fire Smoke Detector Alarm Photoelectric Home Security System Family Guard

85dB Fire Smoke Detector Alarm Photoelectric Home Security System Specifications:Brand new and high quality.Alarm volume: 10 feet to 85 dBRound Size: R = 102 mm, H = 31 mmPowered by 9 V battery (Not Included)Usage: Fire,Smoke. Package:1 x Fire Smoke Alarm 2 x Screws Description:- This smoke detector detects the smoke to make sure everyone is awakened and alerted in case of a fire emergency.The detector is suitable for detecting the smoke in home,room,shop,hotel,restaurant,office,school,bank,library,computer house,storehouse and etc.- Easy to install.- Photoelectric sensor for early detection from all directions.