This product requires a little practice but the results are wonderful. • What you will hear through the BebeSounds® Prenatal Heart Listener® will be different from what you hear at your doctor’s office. Your doctor probably uses Doppler technology, which turns movement into sound. Our Prenatal Heart Listener® amplifies the natural sounds of your baby. • Please use a new 9-volt alkaline battery. • The best time to listen is 3 – 4 hours after eating and when you are relaxed. • The Monitor must be