Used Apple Watch Series 6, 40mm

The Apple Watch Series 6 is a health and fitness-focused smartwatch, featuring features such as measuring blood oxygen levels (via a new sensor and app) and taking an electrocardiogram (ECG) from the wrist. It also features an improved Always-On Retina display and is available with a cellular option that allows for use without an iPhone.
Key Features:
Blood Oxygen Measurement: A sensor and a dedicated app to measure your blood oxygen levels.