one of the largest OEM supplier for fetal monitor products in china fetal monitor module CE certified for OEM Fetal module1.+5V power supply only2. UART interface to your system simply3. Wide beam form,high sensitivity, 9 crystals,1MHz pulsed wave, low ultrasound power, safer to the fetal4. Advanced DSP technology, accurate and reliable5. Zero noise processing, no undesired sound in the speaker6. ...