Digital upper arm blood pressure monitor that measures systolic pressure (SYS), diastolic pressure (DIA) and heart rate. Features: LCD screen (90 x 55mm) Automatic inflation and air release Pressure measurement range 0-300mmHg Pulse measurement range 40-199 beats per minute Measurement accuracy for systolic or diastolic pressure: ± 3mmHg (0.4 kPa) at ambient temperature 15-25°C and ± 6mmHg (0.8 kPa) at ambient temperature 10-14°C and 26-40°C Pulse rate measurement accuracy +/- 5 mmHg Indication of cardiac arrhythmia Adjustable bracelet for arm circumference of 22-32cm Memory for 90 measurements Low battery indicator Works with transformer (not included) or 4 AAA batteries (not included)