Measuring Method : Oscillometric System Fully automatic, accuracy and reliable. Systolic, diastolic and heart rate measurement. Large LCD, jumbo size digit and one-touch button. 10 Memories. Power Source: 1.5Vx4 Alkaline Batteries. 1.5min. auto power off, power saving function. Intelligence voice system ( Option). Range : Pressure:0~300mmHg; Pulse:40~ 200/min. Accuracy : Pressure ‚±3 mmHg; Pulse ‚±5% Working temp. & Humidity : 5 ~ 40 30 ~ 85% RH Storage temp. & Humidity : -20 ~ 60 10 ~ 95% RH Dimensions : 155(W) X 100(D) X 65(H) mm Weight : Approx. 340g Accessories : Arm Cuff, Instruction Manual Place of Origin : Made in China Lead Time : 40 ~ 45 days. Dimensions : 155(W) X 100(D) X 65(H) mm Weight : Approx. 340g.