A must for any advanced first aid or trauma kit, a sphygmomanometer is used to measure blood pressure. This economical and dependable instrument features a black enamel 300mm Hg no-pin stop manometer that is accurate to plus or minus 3 Hg. The navy blue cuff has range markings to indicate the selection of proper cuff size with artery label and gauge holder markings. A stethoscope, sold separately, is needed. A zippered carrying case and complete instructions for use are included.