OURA Ring 5 - Black Size 6

TCH R20 iRing - Ring Size 7 Silver 220 mAh

POBOVi Ring OnePlus - Ultra-Thin Titanium 7 Days Battery Life

OURA Ring 4 - Stealth Ring Size 6

Ultrahuman Ring AIR - Size 12 Space Silver

Ultrahuman Ring AIR - Size 9 Space Silver 6 Days Battery Life

TERRIFI Smart Ring Health Tracker - IP68 Ceramic Body 5-7 Days Battery

Amazfit Helio Smart Ring - Size 12 Titanium Alloy

Horawaii Smart Ring - Black #8 Heart Rate Monitoring

Horawaii Smart Ring - Heart Rate Monitor Black

Garmin HRM 600 - Black 5 ATM