feature 1. Large LCD display is easy to read 2. 2 peoper 99 sets of storage 3. Measuring blood pressure and pulse rate 4. Powered by 4xAAA battery or power adapter or AC adapter (not included) 5. 2 sets of 2 user storage (180 in total) 6. Intelligent live voice 7 high precision and high quality Specification Measurement mode: oscillometric method Measuring range Pressure range: 2.7-37.3kpa (20-280mmhg) Pulse range: 40-160 times / minute Pressure: -15 ° C ~ 25 ° C ± 3 blood pressure (± 0.14 Kpa) 5 ° C ~ 40 ° C (excluding 15 ° C ~ 25 ° C) ± 6 blood pressure (± 0.8 Kpa) pulse: ± 5% or less Temperature and humidity: Temperature: -20-55 ° C Moisture: 85% RH Use temperature and humidity: Temperature: 5-40 ° C Moisture: 15%-85% RH Packsge included a machine a manual a box