WOIYIC Professional Upper Arm Blood Pressure Monitor, Electronic Upper Arm Blood Pressure Monitor for Home Use, Large Adjustable Cuff 22-42 cm, Heart Rate

Features: 90 sets of storage (2 people), IHB arrhythmia detection, WHO blood pressure classification. Intelligent Pressurization Measuring Mode: Measuring Range: Pulse Range: 40-199 times/min Error Range: Static Pressure: ±0.4kPa(±3mmHg) Pulse: Within ±5% Cuff Lengths: 22-42cm(8.66-16.5inch) Power Supply: DC6v (four AAA batteries) Auto Shutdown: 60s Storage Temperature & Humidity: Temperature: -20 to 65°C Humidity: 10% to 90%RH Using Temperature Humidity: Temperature: 5 to 40°C Humidity: 10% to 90% relative humidity How to use it? 1. Stay relaxed before measuring, sit quietly for a while 2. Palms facing up, place the wristband parallel to the heart 3. Palms facing up, keep the inlet pipe and arteries parallel 4. Wrap the wristband tightly around your arm in the opposite direction, stick together 5. Place a finger in it is the most suitable 6. Keep the wristband parallel to the heart, palms facing up 7. Press the on/off button, stay relaxed and start measuring.