Gas Detector for the Household, City Gas, Methane Propane Butane Natural Gas, LPG, City Gas Alarm, Flammable Gas Warning Detector, with Gift Box as last picture: If flammable gases (kitchen methane/natural gas/camping propane) exceed the standard, the gas detector 85 dB will turn off slow, accelerating, noisy, continuous alarm sound. Cannot detect toxic gas such as CO. Widely used for restaurant, kitchen, hospital, hotel, oil factory, garage, petrol station, etc. Powerful functions: this alarm measures precisely and displays an easy-to-read concentration (0 ~ 20% UEG) of flammable gas, including natural gas (main ingredients: methane), LPG (main ingredients: propane, butane) and urban coal gas (alkane, olefin, arene). An alarm sounds and the red light flashes as soon as the concentration is above 3% UEG. When a gas leak is detected, the alarm will display a different alarm status. Durable and energy-saving: plug-in gas alarm design for home use, A/C powered, makes it super easy and convenient to install. This detector is protected against mildew, pests and corrosion. Flame retardant ABS plastic, easy to wipe clean. It consumes less than 2 watts of power and saves a lot of power. Test method: Press and hold the lighter switch on the gas inlet of the methane detector and release the air slowly (do not ignite the lighter during draining). When the concentration reaches the standard, an alarm is emitted until the ambient gas volume falls below the alarm set value. This gas alarm has passed the professional gas detection test in our factory. Our gas detectors have CE and ROHS certificates and a mandatory China certificate. We offer 100% guarantee, any quality problems you can refund within 30 days.