The Fitbit mobile app now lets you sync multiple trackers to your account | Windows Central
Amazon.com: Fitbit Versa 2 Health and Fitness Smartwatch with Heart Rate, Music, Alexa Built-In, Sleep and Swim Tracking, Bordeaux/Copper Rose, One Size (S and L Bands Included) : Electronics
Sync Multiple Devices to Your Fitbit Account with Multi-Tracker Support - Fitbit Blog