Sonotech Lite Fetal Heart Doppler with Head Phone Quality for

Product Information: Operating voltage DC3V(2pcs AAA battery) Work frequency 3MKHZ ±15% Comprehensive sensitivity distance at 200mm,not less 90dB Fetal heart rate measurement range 50BPM~210BPM Measurement accu

Hospital Equipment Fetal Heart Doppler with Head Phone Quality for

Sonotech Lite Fetal Heart Doppler with Head Phone Quality for

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Sonotech Lite Fetal Heart Doppler with Head Phone Quality for

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Hospital Equipment Fetal Heart Doppler with Head Phone Quality for