Phaedra Mini Doppler, Detect and Display Fetal Heart Rate

description About this item This product is handheld, battery powered audio Doppler designed for home use. It is intended to detect and display fetal heart rate. The device is intended for use at or after 12 weeks gestation. It has two hand-held components, a main unit and a probe. The ultrasonic signal is continuously transmitted at a frequency of 3.0 MHz. See more product details