Fully-Automatic Low or High Blood Pressure Wrist Monitor Large LCD display Wrist Cuff (Included) fits wrists 5 in. to 9 in. (circumference). Inflation: micro rolling pump. Pressure exhaust: solenoid valve. Power: 2 AAA Alkaline batteries. Low Battery Indicator: Yes. Auto shut-off: 2.5 minutes after last key operation. Battery Life: Around 250 operations. Measurement method: Oscillometric. Measurement range: Pressure 20 - 300 mmHg; Pulse: 40 - 200 beats/min. Accuracy: Pressure +- 3mmHg pulse +-5%; Pulse: within +-5% of reading. Memory: 85 sets. Dimensions: 2.8 in. x 2.9 in. x 1.5 in. (L x W x H). Weight: 0.52 oz. with batteries. Kit includes: Blood pressure monitor with attached wrist cuff hard sided carrying case easy to follow instructions record log and batteries.