Fitbit's smartwatch will not include standalone connectivity - Wareable
Amazon.com: Compatible Replacement for Fitbit Blaze/Versa 2/ Versa/Versa Lite/Versa SE Ankle Band, Breathable Ankle Band for Men and Women (Black, Small) : Electronics
Fitbit buys wearable tech from Coin, looks toward NFC payment integration in future devices | TechCrunch