features：
1. the ultrasound dosage is under 50% of the national ultrasonic power standard.
2.light weight,handset,portable
3. large lcd display with blue backlight.
4.built-in loudspeaker,more clearly loudly.
5.support 2.5mhz waterproof probe;accurate fhr detection with clear sound.
6.monitor 12 weeks above unborn babys blood wall pulsate.
specification:
1. ultrasound probe:solid and durable,anti-shock,anti-falling down
2. ultrasound frequency:2.5mhz+3%
3. ultrasound intensity:<2.5mw/cm2
4. fhr scope:50~210bpm
5.power adapter:ac 220v 50hz,dc12v(on request)
6.rechargeable batterry:9.6v,300ma
7. size:129mm*82mm*32mm
8. weight:main body 0.53kg
9.temperature:5-40℃
10. humidity:0~85%