Was given to me for nursing graduation. I chose a nursing career that wasn’t bedside. I have never used it but to try on my classmates. DUO is the first and only smart cardiac disease detection system that helps identify murmurs and AFib at the same time in seconds when connected to the Eko App. A combined ECG and digital stethoscope, DUO helps you get the right information you need during physical exams to perform more detailed assessments and provide exceptional care for your patients.