Features: 1Low Power Circuit Design: The new generation gas detector adopts low power circuit design and new nanotechnology sensor which can detect the concentration of gas very sensitively. 2Sound and Light Alarm: When the gas concentration reaches a certain standard the gas detector will sound and light alarm and at the same time transmit an alarm signal to the alarm center. 3MCU Control: The ceiling gas detector adopts MCU control and low power sensors which has strong reliability high stability and service long life. 4ABS Material: The sound and light alert gas detector is made of premium ABS material which has durable construction and it is also ceiling mounted. 5Two Alarm Method Optional: There are separate alarm and network alarm method optional and it will automatic reset after alarm exclusion. Specification: Item Type: Natural Gas DetectorMaterial: ABS Gross Weight: 122g/4.3ozQuiescent Current: 70MAAlarm Current: 150MAAlarm Concentration: 10-25 percents LELBuzzer Sound Pressure: 70DB/MWorking Environment: -10---+45Applicable: For family residential areas real estate villas factories shopping malls warehouses office buildings etc. Package List: 1 xNatural Gas Detector2 x Screw2 x Expansion Tube