Increased quality criteria and technical advancements in smoke alarm devices are indicated on the market with the new Q test mark. The new Q-Label is an autonomous, manufacturer-independent quality mark for high-quality smoke alarm devices which undergo special testing for long-term use. The latest generation of Gira smoke alarm devices fulfil the criteria of the new Q-Label quality mark. The smoke alarm devices operate based on the photoelectric scattered light principle without radioactive particles. The smoke alarm devices detect smoke accumulation early and emit a warning signal before the concentration of smoke can become hazardous to people. Alerting occurs via a loud pulsing alarm tone and a flashing LED.