1) Power: 9.6V recharge table batteries or 9V cells
2) Ultrasonic frequency: &e;5m W/cm&up 2;
Pocket doppler offers detecting FHR throughout the last trimester of
pregnancy to the baby s first moment of life. It can be used in
hospitals, clinics, and homes, and has a battery life of about 8 hours.
Environmental paper-box BF-500
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