High sensitivity probe, no radiation, low-ultrasound power, safety and with high accuracy
Large LED display, you can see the fetal heart rate, battery capacity, and volumes clearly
Equipped with volumes adjustable function, you can adjust the volumes easily according to your demands
Insert the 3.5mm 32 mono or dual channel headphone plug into the headphone jack of the device, you can use the headphone to listen to fetal heart sound, at the same time, the external speaker of the device will be closed, without any sound output
After hearing a recognizable, rhythmic fetal heart rate sound, keep the probe stationary for at least 5 seconds so that the device can measure and display the fetal heart rate correctly