The optical wireless smoke alarm ABUS RM40 Li Funk triggers a loud alarm at 85 dB as soon as smoke enters the measuring chamber. A total of up to 32 smoke alarms can be networked together. An alarm from the triggered smoke alarm is automatically transmitted wirelessly to all smoke alarms in the system, which then also sound a loud alarm. This is particularly important if you live on several floors, in a large house or if the children's room is far away from the parents' bedroom, for example. This way, all residents are warned in the event of a fire and can get to safety in time. It is recommended that you carry out a wireless test before permanently installing the detectors.