Item description Brennenstuhl Smoke Detector RM L 3100 Description Smoke detector RM L 3100. Suitable for long-term use. VdS tested according to DIN EN 14604. 10 years of operation without battery replacement. 3 V lithium battery installed in the device for permanent operational safety. Optical display of function, with test button for checking correct operation. Includes mute function and 'Do not disturb' function for low battery. Piercing alarm signal 85 dB. Optical and acoustic signal for low battery. Includes mounting material. In colourful display box. Height x Diameter: 31 x 100 mm. Alarm signal: 85 dB. Battery type: 3 V DC. Show more