The Edan SD1.B is a compact, all-in-one handheld fetal doppler featuring a 3 MHz integrated probe and a digital FHR display. This advanced "B" version includes internal Bluetooth connectivity, allowing it to sync with a dedicated iOS or Android app. It enables expectant parents and clinicians to track, record, and share fetal heart rate data directly from a smartphone, combining professional-grade sensitivity with modern mobile integration.