Brand AOEOM Model ABP-A091V Color White + silver grey Material ABS + acrylic Quantity 1 Display Screen 4" LCD Measuring range 30~280 mmHg Functions Blood pressure pulse and heart rate measuring Measuring Method Oscillography Memory Function 240 groups Pressure Accuracy Within +/- 3mm Hg Voice Function Yes Pulse Accuracy Read values within +/-5% Exhausting Method Auto-rapid exhaust Power 4 x AA batteries (included) Features Microcomputer intelligent measurement system; Capacitive pressure sensor with blood pressure warning Packing List 1 x Arm auto blood pressure monitor 1 x Arm band 4 x Batteries 1 x Chinese manual