Ultrahuman Ring AIR - Size 8 Space Silver

TCH R20 iRing - Ring Size 7 Silver 220 mAh

OURA Ring 4 - Stealth Ring Size 6

Shenzhen Ninenovo Technology Limited RingConn Gen 2 Air - Ultra-Thin 10-Day battery

S SECRETTOP Fitness Tracker Ring - Heart Rate Blood Oxygen

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

Horawaii Smart Ring - Silver #8

Amazfit Helio Smart Ring - Size 12 Titanium Alloy

Horawaii Smart Ring - Black #8 Heart Rate Monitoring