1 . Quickly click the first Alarm test button 5 times, the green light will flash slowly, after 6 seconds you will hear " Pairing, please wait ", and the green light will be always on.2 . Quickly press the second Alarm Test Button 5 times, the Green light flashes slowly for 6 seconds ( it needs to be completed within 60s after the first Alarm's light is always on), you will hear " Pairing Success ", indicating that the addition alarm is added successful.3 . If you hear " Pairing failed ", please repeat steps 1 and 2 until its successful4 . Repeat steps 1-2 for additional Treatlife Alarms