Angelsounds dopplers are designed for pregnant women and their families to be able to hear the fetal heartbeat at home, this helps the family to be more involved and to feel closer to the unborn baby. This set now includes free software and gel so that you are able to share your babys heartbeat straight away. The PC software included also allows you to record your babys heartbeat to keep forever. Comes with headset and volume control, you will be able to hear the babys heart beat from 12 - 16 weeks. Lightweight and portable for convenience.