Specifications: Automatic digital upper arm blood pressure monitor Large lcd display High quality Automatic digital upper arm blood pressure monitor Description Upper arm blood pressure monitor Display Lcd digital display Measuring principle Oscillometric method Measuring localization Upper arm Measurement range Pressure 0-299mmhg(0-39.9kpa) Pulse 40-199pulses/min Accuracy Pressure ±3mmhg(±0.4kpa) Pulse ±5% of reading Memory function 2*90 sets memory of measurement values Power source 4 pcs aa alkaline battery or power adapter Automatic power off In 3 minutes Battery life Approx. 300 times for normal condition Accessories Instruction manual, storage box Operating environment Temperature 5-40°c Humidity 15%-85%rh Air pressure 86kpa-106kpa Storage environment Temperature -20°c to 55°c Humidity 10% to 85%rh Avoid crash, sun burn or rain during transportation