From about the middle of your second trimester, the Summer Infant Heart-to-Heart PreNatal Listening System is a great way for you and your family to increase the growing bond with your unborn baby. The simple technology doesn't rely on ultrasound and is completely non-invasive, making it as safe to use as it is heartwarming. Listen in on that growing baby's heartbeat, kicks, punches, and even hiccups using two included headsets, one for Mom and one for a loved one. You can even record to your home computer and send the recording to grandparents and friends who aren't close by. Make your impending new arrival an integral part of the family even before she arrives.