Interlinked Smoke Detectors/Alarms There are x10 X-Sense Interlinked smoke detectors. (XS01-WR). To Test the Alarms Individual AlarmsTo test an individual alarm press once the button on the side of the unit. All Interlinked AlarmsTo test the full interlinked system - press and hold the button until all other alarm sounders are activated. Copy of the instructions: Z:\Staff Folder\MANUALS & TRAINING\Fire Alarms X-Sense Interlinked Smoke Alarms.pdf