Unfortunately, fewer points will not ...

I just leave due to the positive reviews tempted to buy these low Doppler. As always has been considered here, who buys cheap, buys expensive. Also have returned again the thing. Why?
Because the display of the heart sounds in no wise agrees with the heard. The displayed are sometimes twice as high as the acoustic. I am a midwife and know what I'm talking about. Also, I have the heart sounds even checked simultaneously with two other devices. I can not use this device for my work because it is not reliable.