Full Automatic. Quite a Health Monitor for Your Family!Best Gift to Parents， Elderships or Friends!Product Feature: 1.LCD digital display， legible 2.Intelligent pressure 3.WHO blood pressure classification4.IHB irregular heartbeat detection5.Double mode，each of the 90 set of measurements of memory 6.No operation in 1 minutes automatic shutdown 7.The overpressure protectionfunction. 8.An irregular heartbeat tips 9.The clock feature Product Specifications Product Dimensions: 77.5mm x 68mm x 30mm (excluding wristband) Storage temperature: -20 ~ 50 degree Storage Humidity: 15% to 90% Operating temperature: 10 ~ 40 degree Operating Humidity: 40% to 85% Display: LCD digital display Measuring method: pulse scanning / oscilloscope assay Measuring range: hypertension / hypotension: 20mmHg ~ 280mmHg Pulse: (40 to 200) beats / min Resolution: 1mmHg (0.1kPa) Accuracy: Error less than 3mmHg (0.4kPa) Pulse: error less than 3% of reading within Voltage: 3V Power Consumption: 0.01W Note: Battery is not included.