Reduce your trips to the hospital to check the blood pressure. Get this GB Series aneroid sphygmomanometer from Rossmax and check your BP at home. 300 mmHg Manometer - This unit can measure the blood pressure in the range of 0 to 300 mmHg. Nylon Cuff - The latex-free nylon cuff of this BP monitor snugly fits your upper arm and helps you take accurate measurements. Bulb and Air Release Valve - The bulb and chrome-plate brass air release valve let you increase and gradually release the pressure in the cuff with ease. Professional Use - This BP monitor features a professional design and comes with a single-head stethoscope and can be used by doctors.