We use both of these types of sound modules. If your battery dies, you will NOT lose your baby’s heartbeat unless you move the on/off button on the side or back of the sound module. Do not touch that button or you will lose your baby’s heartbeat. Simply change the batteries as shown in the diagrams above and place back into the heartbeat bear.
Sound modules can be purchased for $15 if you have a bear that you would like to use in place of our plush animals.