Amazon.com: Garmin vívofit 4 activity tracker with 1+ year battery life and color display. Small/Medium, Black. 010-01847-00, 0.61 inches : Sports & Outdoors
Amazon.com: Garmin vívofit 4 activity tracker with 1+ year battery life and color display. Large, Black. 010-01847-03 : Sports & Outdoors
Hands-on: Garmin Vivosmart 4, now with Pulse Ox and Body Battery | DC Rainmaker
Garmin Vivofit 4: Replace the batteries! - YouTube