Foshan Shunde Changxing Ultrasound Equipment Co., Ltd.'s brand, the leader of the fetal heart rate instrument industry, its medical products cover more than 70% of the country's medical institutions, is the designated supplier of many units of the United Nations, and is also the only fetal heart rate instrument manufacturer on the market that has obtained PICC product quality insurance, and its home fetal heart rate instrument has a market share of more than 30% in the country, ranking in a leading position. The ultrasonic power is 1.58mW/cm2, far lower than the national standard of 5mW/cm2, the signal quality is constant and accurate, it can work continuously for more than 8 hours, and the attached fetal heart rate recording software can produce an audio commemorative album belonging to the baby, which is the preferred brand of fetal heart rate instrument, and most of the models are priced at 170~400 yuan.