Our Sonotrax Basic model is a high performance model with FHR digital LCD display. It has three heart rate processing modes: real-time FHR display mode, averaged FHR display mode, and manual mode. The basic model has a built-in audio output speaker as well as, an audio output jack for earphones or to connect to your PC for recording purposes. The Sonotrax comes with 4 or 8 Mhz probe, carrying case and gel. All of our doppler have a 7 day return policy and 1 year warranty.
