1)Measurement Method: Oscillometrc System 2)Display Type:Digital LCD 3)Display Size: 58mm?39mm 4)Measuring Range : Pressure:30-280mmHg 40-200beats/minute 5)Measuring Accuracy: Pressure: ± 3mmHg Pulse: ±5% 6)Operating Environment: Temperature:20±10°C Relative Humidity:≤80% 7)Storage Environment: Temperature:-5°C-35°C Relative Humidity:≤80% 8)Dimensions : 65mm?75mm?30mm 9)Power Source: DC3V 1W 2?AAA Batteries 10)Weight with Batteries :120g 11)Warranty: One year warranty