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The device is a hand-held orbsteatrical unit used for detecting fatas heatbeat sound or daily self-check by preangant woman. Product name: Fatus Doppler Ultrasound Equipment Material: Plastic Quality Certification: CFDA Safety standard: IEC60601/GB9706.1 Display mode: LCD Display Battery: USB Rechargeable Power Source: Electricity Measuring Range: 50 - 210 bpm Accuracy: ±2 bpm Ultrasound Frequency: 3MHz Operation Mode: continuous Power: DC 3.7 V (Rechargeable Litium battery) Color: Blue/Pink Probe: Independent Gift Box Size: 154*108*59mm How to use: Press the power button to power on, then adjust the volume Lie flat with a cushion pillow, keep legs straight and relax Attach the probe to the abdomen to locate the position and find out the best direction to the heart After hearing regular heart sound, the FHR value will display on the screen in real time Time weeks: not less than 9 weeks Package: 1 x Fatus Dopplor 1 x USB cable 1 x User Manual

1.8" backlit LED screen with a more intuitive and easy-to-read curve. USB rechargeable for more convenient and eco-friendly Easy to use digital display monitor at home. Built-in speaker with volume control, on / off switch, volume control, headphones and speaker are all doable