- Pocket type, built-in speaker, auto switch-off
- Two modes: real-time FHR and average FHR
- AA alkaline battery or AA Ni-MH rechargeable battery
- The sound of the fetal heartbeat is recorded
A fetal Doppler is a test that uses sound waves to check your baby’s heartbeat. It’s a type of ultrasound that uses a handheld device to detect changes in movement that are translated as sound.