1.       Low ultrasonic power
2.       Power saving
3.       Compact and portable
4.       Easy carry and operate
5.       Three calculation mode of FHR
6.       Built-in loudspeaker and LCD display
7.       Waterproof probe
8.       Probe: anti-shock and anti-falling down
9.       High sensitivity
10.   Rechargeable battery

Suitable fetus	After 12 weeks
Ultrasonic frequency	3.0MHz continuous wave ±3%
Ultrasonic intensity	<2.5mW/cm2
Power supply	AC 220V 50Hz   DC 7.2V (3*2.4V) battery built-in nickel-hydrogen rechargeable battery
Machine dimension (mm)	140*95*32
Working temperature (℃)	5~40
Working humidity	0~85%
Net weight (Kg)	0.25
FHR range (bpm)	60~210
LCD display dimension (mm)	28*21