Mobile APP Control Intelligent linkage High Decibel Alarm Remote Valve Shut-Off Fault self check Plug and Play Working Voltage: AC 85V-250V Average Consumption: <1.5W Alarm Sound: 70dB/m Alarm Density: 6%LEL + 3%LEL (CH4) Wireless Protocol: Zigbee 3.0 802.15.4 Working Temperature:-10°C-+50°C Working Humidity: <95%RH