


TFP Blood Pressure Smart Ring, Sleep Tracker, Activity & Fitness Tracker, Blood Oxygen Tracker
$129.90 $89.00
AI-Driven Health Insights
10-Day Battery Life
No Subscription Fee
30-Day FREE exchanges
Size Chart
How to Measure Your Ring Size
1. Choose a thin, non-elastic string and wrap it around your finger.
2. After straightening the string, measure its length using a ruler and compare it to the specifications in the table.