Ambulatory Sphygmomanometer Model: DXJ-210A Ambulatory type LCD instead of mercury Measurement Method: Stethoscopy Accuracy: Pressure Within +/-3mmHg Cuff for upper arm circumference: 22-33cm No pollution Easier to move and read. Quickly and accurately measures Systolic - Diastolic and Pulse Rate Accessories: Cuff, Ball Pump CE approved, ISO13485, ISO9001 Obtain the People's Republic of China Patent Utility Model Patent No.:ZL2006 2 0031103.5 Design Patent No.: ZL2006 3 0135722.4 Suitable for hospital,clinic