Parks Medical Electronics Doppler Flow Detector 811-BTS 8.1 Mhz Probe w/ New Battery

Web Information The Model 811 Series (811-B, 811-BTS, 811-BL) Features: Auto-shutoff option (Model 811-BTS) Built-in speaker Auxiliary headphone output Rechargeable battery Low-battery indicator 8.0 MHz to 9.9 MHz frequencies available Various welded-metal cases available   The Model 811 Series is our most popular Doppler for hospital service.  Model 811-B, our most popular by far, is shown on our home page.  Many of these units have been in use for over 25 years.  These instruments have been modified internally to keep abreast of newer technology, but the "black box" package has remained the same (blue and white are available). This design is now offered in a variety of housings, some with lids to contain gel, probes and charger.  Most buy it just as shown in the picture, with either the flat probe or the pencil probe shown with Model 810-A.  Used extensively in the OR intraoperatively and for lower limb and arm systolic blood pressure measurements post-op and on the ward. Ava