1.Tuya Smart ZigBee Gas Leakage Detector Sensor:A Tuya ZigBee Wireless Gateway Hub is a must to work with the gas leakage sensor,as well as a of ZigBee smart products, which is proved to be and control center for smart homes and plays an irreplaceable role for all ZigBee products and realizes the whole intelligent linkage of your house.Simply add the sensor into the ZigBee hub after adding the hub into Smart Life/Tuya App. 2.App Push Notifications:Compatible with Smart Life and Tuya App enables the timely of danger of gas leakage and real- time notifications to your smart phone.No need to be connected to the alarm host that is to work independently with ZigBee hub connected successfully. 3.Smart App Remote Control with manual test and manual muting:Remotely self-test for the gas security offers much convenience,as well as manual muting,is smartly supported via smart phone app with alarm situation,which is applicable for kitchens and the indoor area with potentiality of gas leakage. 4.Real-time Voice Alarm Prompt:Measurement range is 0%-100%. Once the alarm density is not in the range of 8%(natural gas),the detector will issue 70dB alarm sound and push notification to you App automatically. 5.Easy installation with USB for low power consumption;Wall-mounting and ceiling-mounting optional;Wide application for traditional fire protection system,but also a precaution of gas leakage,which is proved to be a security sensor for your with live sound and light alarms; Wireless Technology:ZigBee Working Voltage :AC220V AlarmLEL:8% (natural gas) Operating Environment 10Cto+55C/=95%RH AlarmMethod :Audible and visualalarm,andwireles sconnectionalarm Transmission Frequency:2.4GHz Standby Current:100mA Alarm Sound Pressure:70dB(1minfrontofthegasdetector) Colour:White Material:plastic Package Contents: 1 x Gas Leakage Detector 1 x Charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.