Product size: 7.56 x 6.84 x 3.1 (without 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 determination Measuring range: Hypertension/hypotension: 20 mmHg280 mmHg Pulse: (40200) times/min/Accuracy: 3 mmHg 0.4 kPa/Pulse: within 3% of the measured value Voltage: 3V Power supply: 2*AAA alkaline batteries (not included) Package includes: 1*Blood Pressure Monitor (without battery) * Accurate and reliable: The pressure accuracy is 3 mmHg and the pulse measurement accuracy is 5%. Easily monitor the health of you and your family closely. It has advanced measurement technology to provide you with the most accurate readings. It can be operated with just the push of a button, which is very easy for the elderly. * Effective health monitoring: You can quickly measure blood pressure and pulse, detect and monitor abnormal heart rhythm, thereby preventing serious damage to organs and blood vessels.