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Title: WAY too sensitive... don't bother
Review: That horrendous sound you're hearing is actually the tiny bit of friction in the nuckles of your fingers because this device is SO sensitive, it will pick up EVERYthing. We found it to be so rediculously sensitive that it was impossible to differentiate the baby's heartbeat from other sounds such as the mother's digestive system. The worst part was trying to keep still enough to eliminate these parasitic noises. Even the most impercievable joint movement in the user's hand is picked up loud enough to block out all other sounds. Spend your money on something else.
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