Garmin Vivofit 4, First Take: Great battery life, but no heart-rate monitoring | ZDNET
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Garmin Vivosmart 4 review: Garmin's new ultraslim Vivosmart 4 gets more features, easier to use - CNET
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 Vivosmart 4, Activity and Fitness Tracker w/ Pulse Ox and Heart Rate Monitor, Black : Clothing, Shoes & Jewelry
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Amazon.com: Garmin Vivosmart 4, Activity and Fitness Tracker w/ Pulse Ox and Heart Rate Monitor, Black : Clothing, Shoes & Jewelry
Garmin vivosmart 4 review: If you don't need GPS, this is a great option