Comfort equipment for max. 3 sensors to detect gas (propane, butane, methane and narkosis gas (KO-gas-assault) and applicable for narkosis gas (KO-gas-assault) at the same time . 12V DC. Operating thresholds: butane approx. 0,4 %: propane approx. 0,5 %: methane approx. 0,8 %: narkosis gas starting from approx. 100ppm. On/Off switch, yellow LED for start-up phase, green LED for operation display, red LED (3x) for notification of emergency, electrical hooter with 85db (A) /3m, relay output for flash light or hooter, 1A/30V DC, connection type for two further sensors. Current consumption: passive status approx. 90 mA (alarm approx. 145mA): add on sensor approx. 60 mA. For combination alarm function a second sensor is recommanded , which should be installed approx. 30 cm over ground (please order additionally).