This gas detector warns of leaks of methane (town/natural gas) and liquid gases (propane/butane) with a loud 85 dB(A)/3 m warning tone. It is equipped with visual indicators and a self-test function. An integrated and calibrated sensor reacts long before a dangerous gas concentration in the air develops. Easy and flexible mounting. Includes power supply unit with m long connection cable. Power supply: 12 V DC power supply unit or 12 V DC ( /- 10 %) on-board power supply. The gas alarm is technically and electrically tested according to EN 50194-1:200Dimensions: 75 x 75 x 28 mm.