Boxym Home Automatic Wrist Blood Pressure Monitor Blood Pressure Voice Digital Oxygen Blood Glucose Blood Pressure Instrument. Features: - Smart pressure. - 90 sets of data memory function. - WHO Blood Pressure Health Warning Bar. - Heart rate irregularity function. - Overpressure protection. - Intelligent automatic shutdown function. - Each set of measurement results can be queried sequentiall. Specifications: Product: Automatic Wrist Blood Pressure Monitor. Product net weight: 125g. Product gross weight (including packaging): 250g. Product size: 63*66*30 (not wristband). Wristband range: 135~195mm. Packing size: 95*95*95mm. Display: LCD digital display screen. Measurement range: blood pressure 0~280mmHg pulse 40~199 times/minute. Pressurization method: automatic pump pressure. Decompression method: solenoid valve control decompression. Measurement error: blood pressure ±3% heart rate ±5%. Memory capacity: Memorize 90 pairs of measurement data and time. Pressure Sensing: Semiconductor Pressure Sensors. Power: 2 * 1.5 V AAA battery (does not include battery). Measurement interval: 1mmHg. Operating temperature and humidity: +10°C~+40°C/40%~85%R.H. Storage temperature and humidity: -20~°C+50°C/15%~90%R.H. Package Included: 1 X Boxym Automatic Wrist Blood Pressure Monitor