ACCURATE READINGS: Our wrist blood pressure monitor accurately reads your blood pressure and pulse rate. Easy to use: LCD display and adjustable wrist strap make it easy to use and comfortable to wear. Irregular heartbeat detection: The monitor can detect irregular heartbeats and provide you with important health information. Portable: The compact design allows you to carry it with you and monitor your blood pressure anytime and anywhere. Product parameters: Product size: 7.56x6.84x3.1 (excluding wrist strap) Storage temperature: -20~50 Storage humidity: 15%~90% Operating temperature: 10~40 Operating humidity: 40%~85% Display: LCD digital display Measurement method: pulse scanning method/oscillometric method Measuring range: high blood pressure/hypotension: 20mmHg~280mmHg Pulse: (40~200) beats/minute Accuracy: 3mmHg (0.4kPa) Pulse: within 3% of reading Voltage: 3V Power supply method: 3*AAA batteries (not included, need to prepare by yourself) Listing: 1* Blood Pressure Monitor