Performing a medical-grade electrocardiogram at home is a revolutionary advancement for your health. Why? We asked Madeline, a Withings expert. #ScanWatch2 — ScanWatch 2 features the medical device Scan Monitor. Scan Monitor is a medical device manufactured by Withings that enables the detection of atrial fibrillation. The ECG feature has been tested and cleared by the FDA. Please read the instructions carefully. If you have any doubts about your results, consult your doctor.