1. Press and hold the power button for 2 seconds to turn it on. (make sure 2 batteries are in )
2. Adjust the volume, Lie flat with a cushion pillow, keep legs straight and relax
3. Wipe the coupling agent on the probe.
4. Attach the fetal probe to the abdomen to locate the position of the fetus and find out the best direction to the fetal heart, Measure close to the fetal heart rate, the FHR value will display on the screen in real-time