This is an excellent sphygmomanometer to be used in ambulances. That said, it can also be used in clinics, hospitals, doctor’s offices, and so forth. The Viso Spencer is made out of anti-shock plastic material and a spiral hose. It features a large dial (5.35-inches / 136 mm) with a Swiss mechanism, as well as a Velcro closure and Ripstop washable cuff.