The information about the product is provided by the seller. Notwithstanding any of this information, the product is not intended for diagnosis, cure, mitigation, treatment or prevention of any disease, is not a drug or a medical device, and should not be used for any medical purposes. Please consult a medical specialist. Easy-Wrap Cuff (fits upper arms 135-195mm). Applicable parts: wrist. Display: LCD Digtal Display Screen. Measurement method: pulse scanning/ oscilloscopic measurement. Measurement range: blood pressure: (0-260)mmHg. pulse rate:(40-199)BPM. Accuracy: blood pressure: within +-3mmHg. pulse rate value:+-5% of measured data Memory capacity: double 90 groups pf measurement data. Pressurization: full automatical Pressurization mode Decompression: full automatical Decompression mode Air discharging: full automatical Air rapid exhaust mode Forced induction: semiconductor pressure sensor Power: DC 3.7V 0.5A Type B