ES100 reviews & articles
The ES100 is well received as the best Bluetooth receiver with exquisite sound quality. ES100 has been on sale since early this year and is currently sold in the US / Europe / most Asian countries and is gaining popularity. Check out Amazon reviews and the Head-Fi community.
Amazon US review: https://www.amazon.com/dp/B078H4YD2L#customerReviews
Head-Fi EarStudio thread: https://www.head-fi.org/threads/radsone-earstudio.867366/