Product Dimensions: 7.56 x 6.84 x 3.1 inches (without cuff) Weight: 280g Storage Temperature: -20 ~ 50°C Storage Humidity: 15% ~ 90% Operating Temperature: 10 ~ 40°C Operating Humidity: 40% ~ 85% Display: LCD Digital Display Measurement Method: Pulse Sampling / Oscillometric Analysis Measurement Range: Hypertension / Hypotension: 20 mmHg ~ 280 mmHg Pulse: (40 to 200) beats/min Accuracy: Pressure: ±3 mmHg ±0.4 kPa Pulse: ±5% of measured value Voltage: 3V Power Supply: 2 * AAA alkaline batteries (not included) Package Includes: 1 * Blood Pressure Monitor (batteries not included) Accurate and Reliable: Features pressure accuracy of ±3 mmHg and pulse measurement accuracy of ±5% for easy and precise health monitoring. Utilizes advanced measurement technology for the most accurate readings. Easy to Read: The blood pressure monitor has a tri-color, backlit display for clear visibility, even at night. Simple one-button operation makes it very user-friendly, especially for seniors. Effective Health Monitoring: Quickly measure blood pressure and pulse, and detect and monitor abnormal heart rhythms to prevent serious damage to organs and blood vessels.