Allowable error: blood pressure: ±3mmHg (± 0.4KPa),pulse rate: ± 5%. - Pulse: 40 - 199 beats per minute. - Blood Pressure: 0 mmHg - 280 mmHg. 1 x Blood Pressure Monitor (include 4 AAA batteries). ❤ Note that your blood pressure can vary significantly in as little as a few minutes.