The Ei141RC Ionisation Smoke Alarm is a mains powered alarm with a 9V Alkaline battery back-up and contains a proven long life Ionisation smoke chamber.
Ionisation alarms are best at detecting fast flaming fires.
The alarm gives a warning when level of smoke enters the alarm. It has a Easi-fit base that allows quick and easy installation. The base automatically connects both mains and battery as the alarm slides on.