The BRK® 660MBX Optical Smoke Alarm is mains powered with a 9V alkaline battery backup that will provide power to the unit in the event of a mains failure. Thermally enhanced optical technology reduces nuisance alarms.

This alarm features a test and alarm pause button, and will also notify you in the event of a low battery. With LED operating indicators and an alarm source indicator. It can be connected with up to 12 compatible smoke and heat alarms for simultaneous warning.

Comes with a 5 year guarantee. Conforms to BS EN 14604: 2005.