Specification: Material: ABS Size: 7.5X6.5X3CM Wristband: 23CM Box: 9.5X9X7CM Parameters: Storage temperature: -20 A?A?~ 50 A?A? Storage humidity: 15% ~ 90% Working temperature: 10 A?A?~ 40 A?A? Operating humidity: 40% to 85% Display mode: LCD digital display Measurement method: pulse scanning / oscillometric Measuring range: hypertension / hypotension: 20mmHg ~ 280mmHg Pulse: (40 ~ 200) times / minute Accuracy: A?a?3mmHg (A?a?0.4kPa) Pulse: within A?a?3% of reading Voltage: 3VPackage includes 1X blood pressure monitor 1X English manual Two 99-group memory, IHB arrhythmia detection, WHO blood pressure classification Smart pressurization, there are two specifications without live voice and real voice. Voltage and power detection Large LCD screen, quick response, adjustable cuffs, especially suitable for the elderly Easy to carry, you can measure your blood pressure anytime and anywhere At the same time, the machine has a certain curvature, which is more comfortable with wrist test