Its Zoe from Lijiang Technology, we are professional medical product development company located in Shenzhen. our product includes oximeter, blood pressue momitor, clinical infrared thermometer. . Display : Liquid Crystal Display Measuring Method : Oscillometric Range of Measurement : Pressure 20-300mmHg (Cuff Pressure) Pulse 40-200 beats/minute (Pulse Rate) Accuracy Pressure �±3 mmHg, Pulse �±5% of Readings Inflation Automatic inflation (Air Pump) Deflation of Pressure : Automatic air release control valve Memory : 42 sets memory Clock : Year, Date, Time Power Off : Automatic Shut Off for Power Saving Operating Temperature : +10C to +40C, less than 85% RH Storage Temperature : -20C to +50C, less than 85% RH Features: Fully Fuzzy Logic Easy to Read Digital LCD Display Automatic exhaust valve 42 Sets Data Memory Automatic Shut Off for Power Saving User Friendly Ergonomic Design Compact Design, Light Weight, Easy to Carry with Protection Case