My garage is about 40 metres from the house and made from heavy section wood panels. I would like to purchase a smoke detector and motion detector. Would there be any on the market that could link to the house with out running a cable? Any recommendations for a set up?
John

Maybe you could use some of these chained, to link back to the house?

Wireless RF Radio Interlinked Smoke Detector Linked Fire Alarm Sensor Link CE

ETA ..... and
maybe these?

1Byone Wireless Driveway Garage Motion Detector Sensor LED Alert Alarm System

[Edited on 24/7/16 by Mash]