Features: 90 groups of memory results. LCD digital display for clear reading. Temperature sensor,avoiding large errors at high or low temperatures. “WHO” blood pressure warning bar,red is high blood pressure,yellow is early warning,and green is normal. Intelligent pressure,predicted and calculated the value needs to be pressurized so as to protect your wristband and machine. Specifications: Voltage: 3V Color: White Display: LCD Pressure: ±3mm Hg Package Weight: 148g/5.2oz Pulse Rate: 40-165 times/min Pulse Accuracy: ±5% Reading Package Size: 97.57.5cm/3.533in Item Type: Wrist sphygmomanometer Measurement Range: 20mmHg ~280mmHg Power Supply: 2AAA alkaline battery (not included) Package List: 1 Manual 1* Blood Pressure Monitor