- Easy to use, high performance baby heartbeat monitor. - New moms can operate the fetal doppler by themselves to hear fetal heart sound and calculate fhr to realize the purpose of pre-monitoring and fetus caring. - Equipped with a high definition color LCD display. - One button to choose data digital display or curve display interface. - Easy to find the baby position quickly as early as 12 weeks, the best time for use is 16 weeks into pregnancy. - Safe and accuracy: High sensitivity probe, no radiation, low power, safe to baby.