What is fetal heart rate? Fetal heart rate refers to the heartbeat of the fetus, a rhythmic noise like a train. The normal fetal heart rate range is 100-160 beats/min. ?Clear Reading: Digital and curve measurement modes can be switched at will. The large waterproof probe with a diameter of 30mm can easily find a baby fetal heart and listen to the fetus's powerful voice. ?Intelligent Noise Reduction: This fetal heart monitor has a noise reduction intelligent sound insulation unit, reducing amniotic fluid flow, intestinal peristalsis, and other noises effectively. Output a clearer fetal heart signal. ?Multiple Listening Methods: The baby heartbeat monitor has multiple methods such as headphones and speakers, selected at will. Simple and convenient. Best time to measure fetal heart rate: within 30 minutes of getting up within 60 minutes after eating 30 minutes before going to bed at night Specifications: Size: 135mm70mm40mm Weight: 0.18KG Working mode: continuous work (automatic shutdown without signal for 1 minute) Heart rate display range: 2.0MHz5% Power supply: 2 AA batteries Error range: 2bpm Probe ultrasonic working frequency: 2.0MHz10% Service life: 5 years Package Content: 1* Baby Doppler 1* Probe FAQ: Is it harmful to test frequently? The fetal Doppler’s ultrasonic output intensity and other indicators are in line with industry standards, and daily fetal heart rate monitoring can be performed with confidence. Why is there noise during measurement? The movement of the fetus or the probe will produce noise. If the fetal heart position is not accurately located, factors such as cord blood flow can also cause noise. Therefore, it is necessary to find the fetal heart rate position and then monitor the sound. For all home care products, you purchase from Homecarewholesale.com, get friendly 24 hours customer service. Enjoy your shopping freely at Homecarewholesale!