37Power Source: Two 1.5V DC (AAA) Alkaline batteriesMeasurementMethod: OscillometricMeasurementRange:Pressure: 40~280 millimeters Mercury (mmHg)Pulse: 40~199 beats/minuteAccuracy: Pressure: ±3 mmHgPulse: ±5% of readingPressure Sensor: Semi-conductorInflation: Pump drivenDeflation: Automatic Pressure release valveMemory Capacity: 60 memories for each User (120 total)Auto-shut-off: 1 minute after last button operationOperationEnvironment:Temperature: 50°F~104°F (10°C~40°C)Humidity: 15% ~ 90% RHStorageEnvironment:Temperature: -4°F~158°F (-20°C~70°C)Humidity: Less than 90% RHSPECIFICATIONS