mumbi GM100 Gas Detector 3in1 natural gas (methane) LPG (propane butane) (tool)
The mumbi RMG 100 Gas Detector 4 in 1 only serves the security. Whether he really works in an emergency, I hope times. Even more, I hope that this case does not arrive. But: The test tone is really loud and shrill. You can hear throughout the house.