The optical wireless smoke detector RM40 Li emits a loud alarm at 85 dB as soon as smoke enters the measuring chamber. A total of up to 32 smoke detectors can be interconnected. When one smoke detector is triggered, it automatically transmits an alarm via radio to all other smoke detectors in the system, which will also sound a loud alarm. This is particularly important if you live on multiple floors, in a large house, or if the children's room is far from the parents' bedroom. This way, all residents are alerted in the event of a fire and can evacuate in time. Tested according to DIN EN14604.