Based on this product's specifications, here are some alternatives and similar models
Smart ring activity tracker Rubicon RingConn Gen 2 Air — gold, 10-day battery, 6.8 mm width, 2 mm thickness, 2.5 g
Summary description:
Rubicon RingConn Gen 2 Air is a compact smart ring activity tracker in gold finish designed for 24/7 wear. It offers a 10-day battery life, round form factor, 6.8 mm width, 2 mm thickness and weighs 2.5 g. Charges via included USB Type-C cable and charging case. Compatible with Android 8.0–12.0+ devices. Suitable for sleep, activity and health monitoring.