The Heart Sound Module records 20 seconds of audio. There is a simple switch on the back to choose record or playback modes, and your recording will stay saved through battery changes. Regrettably there is no way to save old recordings with the heart module, but you may re-record as many times as you like.
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Amazing but... Review by Shelby
I wish it wasn't so easy to re record the sound. What if it is switched over my mistake and you lose your baby's heartbeat forever! (Posted on 9/25/2015)
A potter's syndrome baby's memory Review by Billie Jo Long
I was really pleased with this product. My baby had potter's syndrome. We were able to record his heartbeat and I will have it forever. It was easy to use and I have listened to it regularly since his birth and him going to heaven. (Posted on 9/25/2015)