Description:Our smoke detector is a great household necessity to protect your families' safety. It is highly sensitive, very simple to install. when the smoke leakage occurs, the red indicator will flash and remind you. And it is operated by 1pc 9V 6F22 battery, energy-saving and easy to use. Such a practical smoke detector, worth buying!Features:The shell of our smoke detector is made of high-quality ABS material, which makes it eco-friendly, sturdy and durable to use. Our wireless smoke detector is adopting unique structural design and infrared photoelectric sensor, so it is highly sensitive and has good functions of dust and insect prevention, strong anti-interference and high stability. With LED indicators, when the gas leakage occurs, the red indicator will flash and remind you,to ensure personal safety. Simple to install on the ceiling or walls, and it is operated by 1pc 9V 6F22 battery(not included), energy-saving and easy to use. A great household necessity to protect your families' safety. And it is also perfect for using in office, hotel, factory, School, bank, restaurant and many other places. Specifications:Condition: 100% Brand New Shell Material: ABS Color: WhiteStandby Current: 10A Alarm Current: 12mA Operating Voltage: DC9V Power Supply: 1pc 9V 6F22 battery (not included) Sensor Type: Infrared PhotoelectricAlarm Indication: Sound & Led Light Flash Alarm Sound Level: 85dB/mTransmission Distance: 100M (In open air and without any obstacle)Operating Temperature: -10 to +50Operating Humidity: 95%RHDetecting Area: 20-60Installation: Ceiling InstallationSize(Dia x T): Approx. 140 x 41mm / 5.51 x 1.61inchWeight: Approx. 196gPackage Included:1 x Smoke Detector (Battery is not included)2 x Screws2 x Screw StoppersPlease Note:1. Please don't use it in the place under the condition of smoke retention.2. Please don't use it in the place that has a larger dust, water mist, steam, oil mist and corrosive gas.3. Please don't use it in the place that its relative humidity is larger than 95% and wind speed is larger than 5m/s.