Type: AM-301 Futures: Automatically measures systole,diastole and heart pulse Display measuring date and time 2x24 memory for recall 1~4 alarm per day for medicine time. Display classification of blood pressure Power supply: 4 x AA batteries Unit size: 13.4 x 12.4 x 5.7 cm Specifications: Oscillometric measuring method Measurement Range : Pressure : 0 - 220mmHg; Pulse : 40 - 160 beats/min Pressure Accuracy : +/- 3mmHg(cuff pressure) Inflation Method : Automatic Inflation (air pump) Rolling motor pump allows quiet inflation Operating Temperature:+10℃-+40℃ Humdity:85% or below