Sound activated Wire free retro fit Wayfinder.
This Wayfinder recognises the sound of smoke & fire alms.
It is an intelligent unit that will, within 30 seconds of alarm
activation, will independently switch them on and continue
operation until the smoke or fire alarms switch off. The added
safety feature is that they will continue to operate for a further 45
seconds after the alarms stop to ensure everyone clears the
building. They will then automatically switch themselves off
going back into sleep mode.