Apple Watch Series 6 40mm 44mm GPS + WiFi + Bluetooth - All Colors- Good

Apple Watch SE (2nd Gen) [GPS 44mm] Smart Watch w/Starlight Aluminum Case & Starlight Sport Band - S/M. Fitness & Sleep Tracker, Crash Detection, Heart Rate Monitor, Retina Display, Water Resistant

Apple Watch Series 6 (GPS, 44mm) - Space Gray Aluminum Case with Black Sport Band (Renewed Premium) : Cell Phones & Accessories

Apple Watch Series 6 (GPS + Cellular, 40mm) - (Product) RED Aluminum Case with RED Sport Band (Renewed) : Electronics

Apple Watch (40mm) protective case — style that's sustainable.

Buy Apple Watch Ultra 2 - Apple

Apple Watch Series 7 vs. Apple Watch Series 6: The Biggest Differences - CNET

Monitor even more of your health with the Apple Watch Series 6. The Series 6 adds pulse oximetry to measure your blood's oxygen levels (SpO2) in just 15 seconds, as well as showing you your VO2 Max (maximum oxygen consumption) score. These indicators can provide early warnings of possible respiratory conditions. They are joined by an optical heart rate monitor and the ability to record your own ECG (electrocardiogram).

Apple Watch Series 6 - 44mm - GPS - Space Gray Aluminum Case - Black Sport Band

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Apple Watch Series 6 40mm/44mm (GPS + Cellular) Unlocked Smart Watch Very Good

Samsung Galaxy Watch6 Smart Watch, 44mm, Large, Bluetooth, Graphite

Samsung Galaxy Watch 6: Full Review - Video - CNET

Samsung Galaxy Watch 6 Review

Samsung Galaxy Watch6 Classic 47MM: Prices, Colors, Sizes & Specs

Does the Samsung Galaxy Watch 6 work with the iPhone?