Baby Heart Instrument Monitoring Baby Activity Instrument Doppler Portable Household Sonar Prenatal Baby Heart Rate Detector

* Users need to prepare couplant by themselves
* Material: ABS
* Power supply mode: two AA alkaline batteries (AA)
* Main unit net weight: 178G, with box weight: 280G
* Measuring range: 50-210bpm
* Comprehensive sensitivity>90db
* Features:
1. The two measurement modes of digital curve can be switched at will
2. OLED display, clear reading
3. Integrated design, streamlined appearance
4. Portable and easy to use
5. With signal strength display function, it is convenient for users to find measuring points
6. Autocorrelation algorithm, fetal heart rate can be measured in 12 weeks
7. Using the same DSP technology and fetal heart rate algorithm as the fetal monitor to ensure that the monitored fetal heart rate is accurate and reliable
8. Pulsed ultrasound Doppler working mode, single-chip high-sensitivity probe, 2MHz working frequency, ultrasound dose is much lower than the national safety standard, monitoring the fetus is safer
9. Two size 5 (AA) batteries can work continuou