SpringBud FD-300B Fetal Doppler+60g Aquasonic100 Gel

3 MHz vs. 2 MHz Doppler Probe A 3MHz probe is recommended to detect a heart rate in early pregnancy (8-10 weeks gestation). A 3 MHz has also been proven to work well throughout the pregnancy.When in fact after 12 weeks of gestation either probe is easy to find the heartbeat with.A 2MHz probe is recommended for pregnant women who are overweight.   This fetal doppler is a hand-held obstetrical unit, which can be used in hospitals, clinics, and homes for daily self-check. It is specially designed for pregnant women to conduct daily inspections of Fetal Heart Rate (FHR) by themselves. It contains components of ultrasonic signal transmitter and receiver, analog signals processing unit, FHR calculating unit, LCD display control unit, etc. Features: Battery status indicator Low power inspection of the battery Three modes: Real-time FHR, Averaged FHR, Manual mode. Built-in speaker Output for headphones The probe can be changeable Probe inspection Backlight display. Auto shut off 2mHz probe