This natural gas detector was the first of its kind in the UK and is battery operated for reliable functionality without the need for wiring. It will detect natural combustible gas within your home and is resistant to false alarms caused by normal household contaminants. The alarm sounds at a loud and clear 85 decibels in the case of an emergency and will regularly self-check to ensure that it is operating correctly. Specifications Smart test / Silence / Reset Volume: 85dB Regular self-check for proper operation Resistant to false alarms from normal household contaminants Simple to mount No wiring required Battery operated Requires 2 x AA batteries (available separately) Independently tested and certified: BS EN50194-1:2009 Dimensions: H7.4 x W13 x D3.7cm Colour: White