Our Sonotrax Pro model is a high performance model with FHR digital LCD display as well as a backlight and built in recording for easy playback. It has three heart rate processing modes: real-time FHR display mode, averaged FHR display mode, and manual mode. The Sonotrax comes with your choice of 4 or 8 Mhz probe, carrying case and ultrasound gel. All of our doppler have a 7 day return policy and 1 year warranty.
