•Specifications:
•Name:Fetus-voice Meter
•Material:ABS
•Color:Pink
•Battery:2 * AA battery (not included)
•Earphone:3.5mm 32 Mono -or dual-channel headphones
•Ultrasonic-operating frequency:3.0MHz
•The deviation between the ultrasonic-working frequency and the nominal ultrasonic-working frequency:should not be more than ±15%
•Overall sensitivity:290dB (At a distance of 200mm from the probe surface, the comprehensive sensitivity)
•Fetal heart rate measurement and display-range:should not be less than 65-210BPM
•The speed of sound:1520- 1620m/s
•Acoustic impedance:1.5- 1.7 x 106 Pa.s/m
•Acoustic attenuation:< 0.05dB/(cm.MHz)
•Working environment:
•Temperature:5°C-40℃