Hubble Roo Mode D'emploi page 14

Note:
The best time to listen is 3-4 hours after eating and when you are relaxed.
• Open the Hubble app and follow the in app instructions to read
the measurement, then listen to your baby's heartbeat sound. The
normal heart rate of the fetus is between 110 and 180 beats per
minute.
• If there is no signal obtained over 50 seconds, the app will pop up
retry request.
14 Operating your Roo