BPL FD-02 is an ultrasound Foetal Doppler that is safe to be used on every pregnant women. It provides an audible simulation of the foetal heartbeat using the Doppler Effect. With a large LCD display capable of showing Foetal Heart Rate from 16th week of gestation. BPL FD-01 comes with 2.5 MHz high sensitive ultrasound probe and Built-in loud speaker. Low battery indication and Auto shut down feature saves battery life.