Characteristics

FHR detection from 10-week pregnancy up to delivery.
Matched with waterproof probe for parturition under the water.
Menu option for accurately FHR detection from 30bpm to 240bpm in transient, average and manual calculating value with digital LCD display.
Build-in speaker.
Intellectual cancellation of erroneous FHR.
16-chord alarming on FHR value over-limitation.
Function on volume adjustment and button click sound.
Three Alkaline LR6 batteries, and three 1.2V rechargeable batteries used.
Power selection of 4.5V or 3.6V by menu.
Audible and visual alarming for abnormal FHR
Auto power-off if there are no signals of FHR received within 2 minutes t o save energy.