Monitor amplifies the natural sounds of your baby so you can hear kicks, hiccups, and heartbeat  by placing the monitor against your stomach Sounds should be audible early in the third trimester Record your own heartbeat and play it to soothe your newborn baby Prenatal heart listener    features 1 Headset Hear, record, and email your baby's heartbeat Completely safe:  No AC current Ultrasound or radio waves Improved ClearHeart sound  Enhances clarity and eliminates static Requires a 9V battery (not included) NOT a medical device Blue and white Same as the BE001, with updated and improved design for better sound detection Recording cable