The Angeltalk fetal heart monitor is a device that allows a pregnant woman to listen to the fetal heartbeat from 16 weeks into her pregnancy. Through a transducer which is moved over the lower abdomen, it is possible to hear the sounds as they are picked up through earphones. The device uses ultrasound to pick up sounds in the mother to be's abdomen using the doppler principle, just like the professionals use. Angeltalk is convenient and easy to operate. It's a small lightweight and compact device, approved CE, ROHS.