The ultrasound dosage is under 50% of the national ultrasonic power standard. Compact and portable design provides a convenient use and carrying LCD displays the fetal heart rate Built-in Loud speaker gives more clearly and loudly With automatic shutdown function when the probe not working within one minute With rechargeable batteries, enables to work continuously for over 10 hours after full charge Monitor 9 weeks fetus's blood wall pulsate with the high sensibility probe Three calculation modes to calculate fetal heart rate: instant, 10 second average and manual. 240mm*60mm*15mm.
