A sphygmomanometer is a medical device for measuring blood pressure. It employs a cuff that attaches around the arm of the patient. Two main types include mercury, referring to the liquid element used for measurement, and aneroid, indicating the lack of any liquid. Inflation system is latex free and has an easy-release deflation valve. Index and range markings on the dial for clear readings. Natural Cotton Fiber cuff is durable and stain resistant with a Velcro closure.