The Sanitas SBM 45 might be a good device, but should buy before you must read the fine print in the product details. The cuff is supplied only for an arm circumference of 22 cm - 30 cm suitable. If that's not enough must pick up the accessories. Nice that there is to reorder the next largest (32-42cm). But awkward if one that still does not fit. Furthermore, it is already strange that the unit cost me 28 EUR and the next larger cuff would have been almost as expensive ...