With two display modes: numerical display of FHR and curve display of fetal heart rate variety
The calculation of fetal heart rate is precise and credible because of using the same DSP (digital signal processing) technology and fetal heart rate arithmetic as clinical fetal monitor
Supersonic working frequency is 1MHz, which is much lower than fetal monitoring requirement(refer to international standard), so it's safer
Embedded speaker and audio output port
With alarm function, and the alarm limits can be set
3 x AA batteries are used and with battery state indication
Power off automatically if no fetal heart rate signal can be detected lasting for more than 1 minute
