FEATURE: Split-type design: separate design between host and probe Power with dry batteries AAA The probe taking the principal of fetal ultrasound to collect the fetal heart beat signals of fetus Function: Acquire the fetal heart signals from fetus, broadcast the fetal heart sound through headphones or host embedded rock. Can broadcast music. Can be used singly and also transmit the fetal heart signal to the Remote Central Monitoring System in hospital through ordinary monitoring telephone to provide diagnosis for doctors, enjoying the hospital experts’ diagnostic services at home. Can transmit the real-time sound of fetal heart to the computer saving for memory by specialized data lines