HI-bebe Sound makes you hear what fetus is saying. HI-bebe Sound makes FHR sound by irradiating utrasound at the abdomen, abstracting doopler frequency of heart oeat cycle from the signals reflected from feta heart, outoutting FHR change as a sound, and analyzing these signals. • FUNCTIONS - Built-in Loudspeaker ? FEATURES - Compact and Light - High-Sensitivity Doppler probe - Ergonomic Design - Easy to Use