Hands-on: Garmin Vivosmart 4, now with Pulse Ox and Body Battery | DC Rainmaker
Garmin vivosmart 4 review: If you don't need GPS, this is a great option
Garmin Vivosmart 5 Review | PCMag
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