The Realme Watch S Pro is a new product approved for use by the Federal Communications Commission (FCC). Unlike this OEM's first wearable, it has a circular AMOLED display and a relatively large 420mAh battery. These details are known thanks to its new official certification.
https://www.notebookcheck.net/Realme-s-first-round-faced-smartwatch-may-launch-in-the-US-soon-following-a-full-FCC-specs-leak.493506.0.html