The Parks 811-B Ultrasonic Doppler Flow Detector is our most popular doppler. The Parks Doppler has been a trusted and easy to use unit for many years.
Features a built-in speaker, auxiliary headphone output, rechargeable battery, low-battery indicator and housed in a sturdy case. Supplied with a flat probe, gel, Erka German Sphygmomanometer and set of five Critikon Blood Pressure Cuffs. Very easy to use. Replacement probes and accessories also sold separately.