Why do we recommend 3 MHz probes for fetal heart detection?
Over 90% of OBs, hospitals, and midwives choose 3 MHz probe because they know from the results of millions of exams that 3 MHz works better. It works better because the fetus is so small early in gestation that 3 MHz reflects the ultrasound back to the sensor better than the lower frequency 2 MHz.
A 3 MHz has also been proven to work well throughout the pregnancy.
Sonoline B powerful built-in speaker for listening the heartbeat without headphones
Easy to read LCD with on/off backlight
Clear digital fetal heart rate display
Uses 2 AA size batteries which are easy to find (2 new batteries are included)
Auto-off feature & low battery consumption to ensures hours & hours of usage
Battery icon which indicates how much battery is left
Headphone jack for listening to the heartbeat
Weights only 180g with the batteries inserted
Compact design with buttons which are design to withstand repeated usage without wearing out or breaking
Mode 1: a heart icon is displayed when the heartbeat is detected and the real-time hear t rate is displayed numerically.
Mode 2 : a heart icon is displayed when the heartbeat is detected and it averages the heart rate for a more stable reading.
Mode 3 : this mode allows the user to calculate an average heart rate over a specific period of time by manually pushing a button to start & stop the time.