USB Chargeable Voice Digital Wrist Blood Pressure Monitor BP

USB Chargeable Voice Digital Wrist Blood Pressure Monitor BP
Features:
The clock featureIntelligent pressureLCD digital display,legibleAn irregular heartbeat tipsWHO warning message functionThe overpressure protection function.Voltage power detection,Low power consumptionDouble mode,each of the 90 set of measurements of memory
Intelligent presurize,live nonvoice (optional),Serial port (optional)
Using the oscillometric blood pressure measurement measures the blood pressure accurately 

Specification:
Condition: new 
Product size: 71*73*32mm 
Wristband range: 135~195mm 
Display: LCD digital display screen 
Measurement range: blood pressure 0~280mmHg pulse 40~199 times / min 
Compression method: automatic pressurizing pump 
Reducing the way: solenoid valve control pressure 
Measurement error: blood pressure + 3% heart rate + 5% 
Memory capacity: 90 sets of measurement data and time 
Pressure sensing: semiconductor pressure sensor 
Measurement interval: 1mmHg 
Operating temperature and humidity: ~+40 C +10 C /40%~85%R.H. 
Preservation of temperature and humidity: +50 C -20~ C /15%~90%R.H. 
Weight:200g

Notes:
The wristtype electronic sphygmomanometer is sensitive, so it is necessary to maintain a correct sitting posture during the measurement process. 
After 5-10 minutes of rest, keep breathing evenly, and the measurement site and the heart site should be at the same level.