Specifications: Measurement system Oscillometric method Indication Digital display Measurement range Pressure: 0~280mmHg Pulse: 40~180pulse/min Accuracy Pressure: ±3mmHg Pulse: ±5% of reading Power source AA size×4 Optional AC adapter Battery life Manganese battery: Approx. 300 times Alkaline battery: Approx. 1000 times Outside dimensions W130×H53×D118mm Weight Unit: Approx. 240g (without batteries) Cuff: Approx. 130g