Brand Name SPIRIT Model Number CONTEC07A Power Source Electric Power Supply Mode Removable Battery Material Plastic Shelf Life 3 years Quality Certification CE Instrument classification Class II Safety standard None Type Blood Pressure Monitor Function of automatic power-off Yes Measure Method Oscillometry Accuracy ±2%, 70%~100% Measure range 0kPa(0mmHg)~ 38.67kPa(290mmHg) Power Four "AA" Batteries/5V or 6V Power adapter Safety character Class2 Type BF Dimension 130mm*110mm*80 mm Weight 300g (No Batteries) Resolution 1bpm