Amazon.com: E ECSEM Large Replacement Bands and Straps for Garmin Vivofit JR & Vivofit JR.2 & Vivofit 3, [fits 5.5~8.5 inch Wrists] for 5 Years Kids or Older Children, Black/Slate/Red : Electronics
Garmin Vivosmart 3 Activity Tracker In-Depth Review | DC Rainmaker
User manual Garmin Vivosmart 3 HR (English - 16 pages)