The Heart-to-Heart® Digital Prenatal Listening System from Summer Infant is a wonderful way to hear and share the precious sounds of your unborn baby’s tiny heart.  It is the perfect way to start the bonding process with your baby and is non-invasive.  The digital technology helps provide a clearer transmission of your baby's sounds.  It also includes sound indicator lights that lets you know the intensity level of the sound being transmitted - this helps parents find the baby's heartbeat quicker.