The Rossmax GB Aneroid GB112 is a hand-held manually-operated aneroid sphygmomanometer. It is intended for professional use. The Rossmax sphygmomanometer is a high-quality instrument used to measure BP. It's easy to use with the single-hand operation and large dial face. The stethoscope included allows the user to listen to the arterial flow sounds. Made from a material free from latex, the pressure meter suits most people along with the re-sizeable cuff that can be changed from 24cm up to 32cm.