Title: Aqara Smart Natural Gas Detector Zigbee Gas Leak Alarm Intelligent Linkage Smart HomeSecurity Features： Strict Quality Control,Don't Ignore Any Details.The built-in catalytic combustion gas sensor adopts advanced gas concentration detection algorithm,with high sensitivity, strong anti-interference, and a service life of up to 5 years. When a natural gas leak is detected, immediately alarm and close the solenoid valve in parallel to ensure safety from the source. When a natural gas leak is detected, the linkage gateway will send out an audible and visual alarm, and you can hear clearly when sleeping in the bedroom. When a natural gas leak is detected, the linkage gateway sends a remote reminder to the mobile phone, so that you can confirm the safety of your home even when you are away. Easy Install.The natural alarm can be installed by punching or pasting,according to the applicable situation and personal situation. Specification： Product Name: Aqara Natural Gas Alarm Sensor Product Model: JT-BZ-01AQ/A Detection gas:Methane (CH4) Power supply: 220VAC Product size:: 80.4×31mm (including mounting plate) Net weight: 88G (without adapter) Detection range: 0~20%LEL Alarm setting value: 10%LEL Operating temperature: -10℃~ 55℃ Operating humidity:≤93%RH (non-condensing) Wireless Connection: Zigbee Service life: 5 years (may vary slightly due to different use environment) Package list： 1*Aqara Natural Gas Alarm Sensor 1*Manual Note: 1.This is Chinese version, when you connect with APP, please change the region to China Mainland, thanks. 2.Work with Aqara / switch HomeKit / Mijia 3.Need use Aqara Hub E1, Aqara Hub M1S, otherwise it's not working.