you prefer to use a blood pressure monitor like they do in hospitals and doctor's offices, this is the device for you. You manually inflate and deflate it for professionally accurate readings using an aneroid gauge, air release and inflation light along with an attached stethoscope. No worries about electronics or batteries. The detailed instructions show how to measure your blood pressure with this device. The arm cuff fits arm circumferences of 13 to 17 inches. It also comes with a handy zippered case. Feature- Color: Black- Material: Nylon+PVC- Size: 22 x 12 x 1cm- This manual inflation blood pressure monitor is similar to those used by doctors&39; offices and hospitals. The kit comes with everything you need to start taking your blood pressure at home.- It gives you professional accuracy without the need for electronics or batteries.- Deluxe arm cuff fits arm circumferences of 13 to 17 inches.- Includes an aneroid gauge, air release and inflation light with attachment 22" Stethoscope - Comes with a handy zippered case and detailed instructions Packing List 1 x Blood Pressure Cuff and Stethoscope Set