.b carbon monoxide detector for detention in private households in rooms with combustion equipment such as an open fireplace, gas boiler, heating cellar or instantaneous water heater, warns even at low co concentrations tested according to din en 50291-1, acoustic and optical alarm, co concentration indicator display, wall and stand mounting possible, sensor life up to 10 years, battery life about 5 years. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.