The RWM160 smoke detector features an ultra-flat design at just 2.3 centimeters in height and provides fire protection in an area of approximately 40 square meters. Protect yourself, your family, your family guinea pig, your 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 alarm as soon as smoke particles enter its measurement chamber. The built-in lithium battery lasts for about ten years. When the battery power is low, a beep will sound as a warning. The only thing you should do once a month is a functional check. Thanks to the user-friendly large test button on the smoke detector, this can easily be done in high rooms, for example, with a broom handle.