Hello RJsounds,
Thank you for your feedback, we are sorry to hear about the sensor losing connection. If you have not yet returned it, we would recommend double checking that you are using the correct boot size for your child to ensure that when your baby moves, it does not lose contact with their foot and can provide accurate measurements. Please also feel free to give our support team a call so we can better troubleshoot with you and provide better guidance than what we can provide here. You can call them at 877-772-8080.
