Feature: 1. Stable Test: Pressure monitor built in chip to collect clinical data of most hypertension patients, optimize the software algorithm, for stable measurement. 2. Arm Type: Electronic blood pressure monitor adopted arm testing type design, simple and quick to be adjusted, which is comfortable to wear and use. 3. Home Use: Persistent high blood pressure can damage the heart, brain, kidney and aorta, which is the necessary to have a blood pressure detection device at home. 4. Dual Power Supply: Blood pressure machine adopted one button operation for simple to use, suitable for elderly, which can be plugged in or used with batteries. 5. Simple Operation: Blood pressure monitor is simple to use, just connect the wrist band to the left hand and press the start button to start measuring, suitable for family use. Specification: Item Type: Blood Pressure Monitor Material: ABS Battery Type: 4 x AAA Batteries (Not Include) Measurement Range: Pressure: 0mmHg-280mmHg Pulse Number: 40 times /min-199 times /min Accuracy: Pressure: ±3mmHg Pulse Number: ±5% Style: Dual switching, automatic shutdown, battery and USB dual power supply . Package List: 1 x Blood Pressure Monitor 1 x Arm Strap1 x Manual1 x Storage Bag