Features: Two-person memory records, 99 groups of memory values can be stored, scientific management of blood pressure. Voice prompts during the measurement to stop the elderly from being incapable. It can measure your blood pressure and pulse at the same time. Wrist measurement, not need to take off sleeves, easy to measure, fit and reduce errors caused by wearing. With large LCD display screen for easy reading the data. With it, you can measure your blood pressure anywhere and anytime. Specifications: Voltage: 3V Storage temperature: -20~50 Storage humidity: 15%~90% Operating temperature: 10~40 Operating humidity: 40%~85% Display: LCD digital display Measurement method: pulse scan method / oscillometric method Measurement range: Hypertension/low blood pressure: 20mmHg~280mmHg Pulse rate: (40~200)/min Accuracy: Preesure: ±3mmHg (within±0.4kPa) Pulse rate: accuracy ±3% Memory: 2 x 99 groups Energy: 2 * AAA Cell(not included) Item Size: 75.6 * 68.4 * 31mm Package Weight: 280g Package Size: 120 * 96 * 90mm Note: Powered by 2* AAA cells, which is not included, customers need to buy 2* AAA cells to use. Package List: 1 * Blo od Pressure Monitor