The FireAngel ST-622 smoke alarm has a Thermoptek optical smoke sensor which detects slow-smouldering fires, this sensing technology is used by 90% of the UK's fire and rescue service. Other key features include; 'Toast Proof' technology, which means there is a reduction in the amount of nuisance alarms and 'Smart Silence' so you can silence false alarms easily.

This smoke alarm also has a tamper-proof sealed 10 year lithium battery, perfect to surface mount on to a ceiling or wall.