Features: - Detect Multiple Gases: Home natural gas Sensor suitable for detecting LPG, natural gas, coal gas, fuel, artificial gas, liquefied petroleum gas, liquefied natural gas etc. - Play Voice & Sound Alarm: Gas Sensor offers Voice Notification and a digital readout of the GAS concentration.When gas leak concentration reaches presetting level, the alarm provides a visual and audible signal. 85dB alarm sound, reduce the risk of gas explosion and protect your family's life and property safety. - Widely Applied: This product can be used as independent family alarm equipment, and also can be used as front Sensor of alarm system. Widely Used for Restaurant, Hospital,Hotel, Oil Factory,Garage, Gas Station etc. - Easy-to-install: Gas leak Sensoradopts Easy-to-install Design, can be used by plugging directly into the power socket to detect leaked gas. Notice: Iwould like to remind you that after connecting the gas alarm to the power supply, wait 3-5 minutes for gas detection，the product needs a warm-up process. Specification: Detection gas: LPG, natural gas, artificial gas. Operating voltage: AC100V~AC240V 50/60Hz. Rated power: <4W. Alarm concentration: LPG: 0.1~ 0.5% Natural gas: 0.1~ 0.3% gas: 0.1~ 0.5%. Alarm volume: ≥85dB (3 meters away from the product). Operating environment: -10℃ ~ 50℃, relative humidity < 97% RH. Storage temperature: -25℃ ~ 55℃.  Package Included: 1 x Sensor. 1 x Pack of Mounting Screws. 1 x User Manual(English)