The LUVION Premium Doppler Deluxe-80 is a hand held doppler for inspecting Fetal Heart Rate (FHR) & is specially designed for pregnant women & their families. Pregnant women can operate the doppler by themselves to hear fetal heart sound & calculate FHR. The probe & main units are integrated together Delicate & compact design, portable to use 2 audio output socket design can let expectant mother & father hear the baby fetal heart sound at the same time High sensitive doppler probe Low ultrasound output intensity, much lower than the relative government standard, & with very high safety quality Low power consumption, two AAA size batteries can last more than 6 hours for continuous product use (depend on battery type & volume). Can connect to a computer or recorder to record the baby heart sound with recording cable at the same time of monitoring fetal heart sound. LCD FHR Display with high accuracy Screen will be locked automatically without signal for 15s, helping pregnant women to operate the doppler on their own