The new digital blood pressure monitor uses the oscillometric method of blood pressure measurement. This means the monitor detects your blood's movement through your brachial artery and converts the movements into a digital reading. An oscillometric monitor does not need a stethoscope so the monitor is simple to use. Features: Intelligent automatic compression and decompression Measure systolic, diastolic and pulse at the same time Easy to operate, switching button to start measuring. Can read single or all measures Large-scale digital liquid crystal display screen High-accuracy Specification: Display: LCD Digital Display Measuring Principle: Oscillometric Method Measurement Localization: Arm Measurement Range: Pressure: 30 to 280mmHg(0-39.9kPa) Pulse: 40 to 199 Pulses/min Accuracy Pressure:¡À3mmHg(0.4Kpa) Pulse: ¡À5% of reading Inflation: Automatic by Internal Pump Deflation: Automatic by Air Valve Rapid Air Release: Automatic by Air Valve Memory Function: 99 Sets of Measurement Values Power Source: 4 ¡Á"AA" Alkaline Batteries (Not included) Automatic Power-Off Inactive after 1 Minute Weight:17 oz Color: as picture show Temperature: 5-40¡æ Package includes: 1 x Arm Blood Pressure Monitor 1 x Arm Cuff