usb charging c type cable
Product Name: Doppler Fetal Heartbeat Rate Detector
Power supply: DC 3.7V (±10%)
Internally Powered Equipment
Measurement and display range:
not smaller than 60 bpm to 240 bpm
Measurement error: no greater than ±2 bpm
Product dimension: about 126 mm x 86mm×27 mm
Weight: about 135 g
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