How does MEDITECH Fetal Monitor MD900F work

Meditech MD900F detects FHR vibration in real-time through ultra-sonic waves and extracts FHR through relevant alogrithm on the beams reflected from the fetal's heart.
 
If you adjust the LCD screen, that can be made 90 degrees from up and down, and revolved 320 degrees from left to right. It is convenient for doctors to observe the screen from different angles while monitoring patients. And it can show double heart rate in real-time, which is specially designed to detect twin babies.
 
Doctors or patients can operate the device at the angle of 20 meters with the remote controller.