The 660MBX smoke alarm is a mains powered optical alarm with 9V alkaline battery back up that will provide power to the unit in the event of a mains failure. Up to 12 compatible smoke and heat alarms can be linked for simultaneous warning.
230V mains powered smoke alarm 9V alkaline battery back-up Thermally enhanced optical technology reduces nuisance alarms Test and alarm pause button Low battery warning Multi-alarm interlink (up to 12 smoke and heat units) LED operating indicators Alarm source indicator
