Propane gas and KO-gas alarm. Protection of gas numbness assault and gas leak. Plugged in cigarette lighter socket, after 4 minutes ready for use without any wiring or adjustment. Automatic self check and compensation of temperature for perfect function also by extreme temperatures in the surrounding. LED operation display. In case of emergency resounding of an integrated hooter. e1-type permission. Voltage supply: 12/24V, power input: approx. 60 mA. Alarm threshold: starting from 50 ppm numbness gas.