Increased quality criteria and technical developments in smoke alarms are signalled on the market with the new Q test mark. The new Q label is an independent, manufacturer-independent quality mark for high-quality smoke alarm devices that are subjected to special tests for continuous use. The latest generation of Gira smoke alarm devices fulfils the criteria of the new Q label. The smoke alarm devices work according to the photoelectric scattered light principle without radioactive particles. The smoke alarm devices detect smoke accumulations at an early stage and emit a warning signal before the smoke concentration can become dangerous for people. The alarm is signalled by a loud pulsating alarm tone and a flashing LED.