1High reliability sensor, automatic reset after alarm, warmup time about 180 seconds. 2Using MCU processing, automatic detection of sensor fault, wall mounted installation. 3SMT designs, high stability, this gas alarm will flashing red LED light when it detects. 4The detector adopts the electrochemical sensor, which gives a quick and accurate measurement. 5Can continuously monitor hydrogen gas concentration accurately in the surrounding environment. 1 x Gas Alarm1 x Manual1 x Installation Buckle1 x Screw1 x Nut Item Type: Hydrogen Gas AlarmMaterial: Plastic Plug: EU Voltage: 220V Static Current: 90mA30mA (Low power consumption)Alarm Current: 100mA40mA (Low power consumption)Rated Power: 3WWarm-Up Time: About 180 SecondsAlarm Level: 50ppmAlarm Indicator: Red LED flashesFault Indicator: Yellow LED bright, buzzer longSound Level: 85dB/mOperating Temperature: -10 ~ + 50Environmental Humidity: 95%RH (no condensation)Installation: Wall mountedAlarm Output: Relay output/sound and flash alarmsRadio Distance: 100m open area (wireless type)Standard: GB 15322.2-2003