The ABUS RWM90 optical smoke detector reacts to smoke particles. If too much smoke enters its measuring chamber, a loud alarm signal of at least 85 dB sounds via the integrated piezo buzzer. The smoke detector's detection range is up to 40 m². It is recommended to install one smoke detector per hallway, stairwell, living room, and bedroom. The average battery life is approximately 12–24 months, depending on how frequently you test the detector's function. This is done easily and conveniently using the function test button. One test per week is recommended. A low battery is indicated by regular beeping sounds.

• Detection method: Photoelectric reflection
• Power supply: 9V alkaline battery CR123A
• Function monitoring: via LED and test button
• Siren: 85 dB at 3 m
• Low battery warning: approx. 30 days
• Operating temperature: 0 to 45°C
• Relevant standard: EN 14604
• Dimensions (H x Ø): 36 x 100 mm