Gigaset Smoke Sensor 2.0 Mode D'emploi page 40

SMOKE ALARM
10.
Perform a function test. To do this, press the face of the alarm
for at least 3 seconds.
11.
When the signal sounds, the function test is successful
and the smoke alarm is working correctly.
Caution:
Once a 3V battery is inserted, your smoke alarm is in
registration mode. Removing and re-inserting the battery
starts the registration process from the beginning.
Refer to Section "Safety information - Please note"
38
Smoke Sensor 2.0
All-is-good