Compare VASCULAR DOPPLER WITH INTERCHANGEABLE PROBES OLED DISPLAY OF FHR READINGS AND BUILT IN SPEAKER. STANDARD CONFIGURATION INCLUDES 5MHZ USES AA BATTERIES EDAN USA Log in for pricing Vascular doppler with interchangeable probes OLED display of FHR readings and built in speaker. Standard configuration includes 5MHz uses AA batteries ED-SD305-EA SKU: ED-SD305-EA Log in for pricing Compare