Specification Brand MoesHouseModel ES1ZZ TY Power Supply 3V 1x CR123A CR17335 Lithium Battery Alarm Indicators Red LED light 85dB sound alert at 3m straight ahead Working Temperature 0℃ 55℃Working Humidity 95 RH non condensing Installation Suitable for wall and ceiling mountingFeatures 1 Immediate Alerts Provides real time notifications through a red LED light and an 85dB audible alarm when smoke at a dangerous level is detected 2 Long Standby Time Efficient power usage with a standby time of up to 7 years minimizing the need for frequent battery replacement 3 Remote Monitoring Stay informed and receive alerts via app no matter how far you are from home 4 Versatile Installation Can be easily mounted on either the ceiling or the wall to fit your needs 5 Early Warning System Designed to monitor and alert at the first sign of smoke providing an early warning to prevent the spread of fire Package Include 1 x Smoke Alarm1 x Mounting Bracket1 x Manual3 x Screws3 x Anchor Plugs