LIFEGUARD Fetal Doppler is a device that is used to check baby heartbeat. This device performs a type of ultrasound that uses a handheld device to detect changes in the fetus movement that are translated as sound. This Doppler is completely safe to be sued on pregnant ladies and it offers precise reading on the display digital monitor. Designed with high grade components, metal and plastic, the offered LIFEGUARD Fetal Doppler is functioning on Doppler technology.