【Certified gas alarm for the home】-- British standard specification with CE / RoHS certification - Suitable for detecting LPG (Methane), natural gas, coal gas, gas fuel, artificial gas, liquefied petroleum gas, liquefied natural gas 【Dedicated sensors】-- One sensor for every gas ensures effective, fast and reliable detection 【Visual and Audible notification 】-- When the gas leak concentration reaches pre-determined safety levels the alarms 85dB speaker activates a slow, accelerated or fast, continuous alarm that reflects the gas concentration level. The gas detector is programmed to give a voice notification and a digital readout of the gas concentration level 【Positive safety indicator】-- A simple ‘traffic light’ status indicator which, at a glance, provides visual assurance of operational status to users 【Easy-to-install Design】-- Can be used by plugging directly into the power socket in a kitchen, rental house, residential home, motor-home / caravan, boarding house, hotels, & restaurants