The Xiaomi Mi Watch Color Sports Edition has two weeks of battery life and a SpO2 sensor for ~US$105 - NotebookCheck.net News
Xiaomi Mi Band 8 Fitness Tracker,Smart Watch with 1.62'' AMOLED Screen ,120 Sports Modes, SpO2 Monitor ,Professional Sports Analysis Smart Bracelet - Walmart.com
Xiaomi Mi Band 8 Fitness Tracker,Smart Watch with 1.62'' AMOLED Screen ,120 Sports Modes, SpO2 Monitor ,Professional Sports Analysis Smart Bracelet - Walmart.com
Amazon.com: Smart Watch for Men Women - Oximeter (SpO2) Calorie Pedometer, Sleep and Heart Rate Monitor, 24 Sports Modes 1.47 Inch HD Screen, iP68 Waterproof, Compatible with Android and iOS Phones (2