Withings Scanwatch

42mm, silicone band, great used condition, no scratches on glass face.

Features & details
ELECTROCARDIOGRAM* — The watch and heart rate monitor watch detects atrial fibrillation or normal heart rhythm in just 30 seconds via ECG.
SLEEP TRACKING — Sleep tracker delivers a Score based on light and deep sleep cycles, sleep duration & wake-ups.
HEART RATE TRACKING — Track heart rate continuously during workouts to optimize training, and monitor daily and overnight heart rate to help improve health over time.
WRIST-BASED OXIMETRY — Provides on demand oxygen saturation level (SpO2) in just 30 seconds
WATERPROOF watch - waterproof watch for swimming. Water resistance up to 50m.
24/7 ACTIVITY TRACKING — Dedicated workout metrics, Fitness Level via VO₂max estimation, connected GPS, elevation and step tracker. Great as a running watch.
30 DAY RECHARGEABLE BATTERY LIFE