MDF® Calibra Pro Aneroid Sphygmomanometer with Attached Adult Single Head Stethoscope - Navy Blue Whether at home, in the office, or on the road, the MDF® 808 Calibra™ Pro Aneroid Sphygmomanometer + Stethoscope is a traditional, easy-to-use blood pressure instrument that offers the convenience, portability, accuracy, and trouble-free operation ideal for home practitioners and self-administering users. Stress-tested over 3,000 times and calibrated 5 times, it is one of the most durable, accurate, and dependable blood pressure measurement devices on the market. A precise, certified 300mmHg manometer attains the accuracy of +/- 3 mmHg without pin stop, and features an easily identifiable high-contrast dial. The die-cast zinc manometer housing is finished in textured baked enamel and outfitted with a heavy-duty clip so it can be easily attached to the gauge holder on the cuff. The movement inside each gauge is painstakingly assembled and tested by expert craftsmen with patience, dexterity, and fanatical attention to detail. Every gauge is stress-tested 3,000 times and calibrated five times to achieve the highest level of lasting precision.