A 3.0mhz polycrystalline probe was used

DSP technology, more advanced, more accurate.

High quality and high power output, loud and clear sound.

Wide beam, high sensitivity and noise filtering technology.

Fetal heart rate overrun warning.

Low ultrasonic output power, completely rest assured to monitor fetal heart rate.

LED large screen display, white backlight, can display instantaneous fetal heart rate and average fetal heart rate at the same time.

rechargeable battery.

Charging indication, full indication and under power indication.