: Product size: 7.56 x 6.84 x 3.1 (excluding bracelet) Weight: 280g Storage temperature: -2050 Storage humidity: 15%90% Working temperature: 1040 Working humidity: 40% ~85% Display: LCD digital display Measurement method: pulse sampling/oscilloscope test Measuring range: high blood pressure/hypotension: 20 mmHg~280 mmHg Pulse: (40~200) times/minute/accuracy: 3 mmHg 0.4 kPa/pulse: 3% of the measured value Voltage: 3V Power supply: Rechargeable Packing list: 1 * piece blood pressure monitor (battery not included) * Accurate and reliable: pressure accuracy is 3 mmHg, pulse measurement accuracy is 5%. It's easy to closely monitor the health of you and your family. It features advanced measurement technology to give you the most accurate readings. *Easy to read: The blood pressure monitor has a tri-color backlit screen so it can be read clearly even at night. It operates with just a push of a button, making it very convenient for the elderly. *Effective health monitoring: You can quickly measure blood pressure and pulse, and detect and monitor abnormal heart rhythms to prevent serious damage to organs and blood vessels.