The RWM160 smoke detector is an ultra-flat design highlight at just 2.3 centimeters in height and provides fire protection in an area of approximately 40 square meters. Protect yourself, your family, the family guinea pig, the dog, and everything else that matters by installing smoke detectors! For example, the optical smoke detector RWM160. It is optical because it triggers an 85-decibel loud alarm as soon as smoke particles enter its measurement chamber. The built-in lithium battery lasts for about ten years. When the lithium battery is running low, a beep will sound as a warning. The only thing you should do once a month is a functionality check. Thanks to the user-friendly large test button on the smoke detector, this can be easily done in high rooms, for example, using a broomstick.