The innovative DUO SENSOR technology combines two professional measuring methods: oscillometric technology and Korotkoff technology. While most automatic blood pressure monitors only work with oscillometric technology, which evaluates arterial pulse waves, DUO SENSOR technology additionally measures with the very precise Korotkoff method, which uses a microphone to record heart sounds. Doctors also use the Korotkoff technology to measure blood pressure, as this is very reliable (gold standard) and provides correct readings even in patients with cardiac arrhythmias. The Veroval Duo Control upper arm blood pressure monitor with Comfort Air technology enables gentle measurement. Unlike many automatic blood pressure monitors with pre-programmed cuff inflation pressure, Comfort Air technology determines an approximate systolic blood pressure of the patient for each measurement and adds 30 mmHg for measurement accuracy. This allows for more comfortable upper arm measurements. Fully automatic blood pressure and pulse measurement of the upper arm 2 measurement methods: Korotkoff microphone measurement and oscillometric measurement Detects and displays cardiac arrhythmias Facilitates correct measurements thanks to the patented Secure Fit cuff, control of the correct cuff position and rest display Large illuminated display for easy reading of measured values Indicates ambient temperatures that are too high or too low Easy analysis of measured values with a traffic light system Easy data management and storage with the Veroval medi.connect software Data can be shared by all Veroval devices such as scale and activity wristband USB cable and 4x 1.5 V AA batteries