For monitoring escape doors on escape routes, built-in profile cylinder, loud alarm sound (95db / 1 m), made of metal, painted green, without pre-alarm scope of delivery: profile half cylinder, 2 keys 9 v batteries 1 small with directional arrow for eh door protection pictogram, long light 1 large pictogram for the door, long light, with operating instructions 3 screws for fixing tested according to din en 179 Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.