Fetal doppler

Frequency:

2.50MHz

FHR Measuring   Range

50 BPM ~ 240   BPM (BPM: beat per minute)

Resolution:

1 BPM

Accuracy:

± 2 BPM

Power   Consumption:

< 0.8 W

Suitable Using   Range:

Suitable for   use after the 12th week of pregnancy

Auto Shut-OFF:

After 1 minute   no signal, power off automatically

Power supply:

DC 3V (2 x AA)   dry batteries

Size/Weight:

12mmx8mmx3mm, approx.   155g