2 In 1 Combustible Natural Gas Leak Detector Carbon Monoxide Sensor LCD Display Two Power Supply Methods Alarm System for Home

Specification Plug-in Carbon Monoxide & Explosive Gas Detector is a smart combustible gas combo detector with sound prompt and 9V battery Backup,continuously dispalys of the gas concentration levels from 100PPM-999PPM(±50PPM) and will Voice alarm >85dB when dangerous levels are reached.This detector is a great helper to detect the invisible Gas & CO in the air(such as Natural Gas,Propane,Methane,Liquefied Petroleum Gas,etc)and keep you and your family away from the threat. Feature 【High Sensitivity Dual Sensor Design】 Carbon Monoxide fire alarm is a Catalytic Combustion Method Sensor and the Electrochemical Carbon Monoxide Sensor; Protect yourself and your family from two deadly threats. When dangerous concentrations of Carbon Monoxide or Explosive gases are detected, notify you immediately to save your life in the first place. 【Easy To Use】 Push/test button - Connect to power 90V-240V or 9V rechargeable battery(not included), The detector will display 3 minutes counting 【LCD Digital Display】 This display clearly shows levels of Gas that the unit has detected and stored-- from 0 to 3000 ppm--and it updates every 9 seconds to indicate any sudden changes. 【Voice Alarm】 When the concentration of Carbon Monoxide reaches 100PPM or the concentration of Combustible gas reaches 6%, the LCD screen begins to display the concentration value, and the red LED lights flash and emit a loud voice alarm mode -- 110 decibel alarm.