FHR Display:
Here displays the fetal heart rate value, whose unit is bpm (beat per minute)
Warning:
When the FHR is in the restrict scope, the symbol will display, And the State
symbol will display in a few moments.
Battery Indicator:
When the batteries are low, the Battery Indicator and State symbol will
twinkle.
4.3 Buttons
1 Switch button :
Function: switch on or off the doppler
2 Turn up button :
Function: increase the volume.
3 Turn down button :
Function: reduce the volume.
4.4 Battery
The battery specification: AA×2
WARNING:
Don’t throw batteries in fire because this may cause it
explode.
CAUTION: The batteries must be proper disposed according to local
regulation after their use
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