TechPowerUp checked out the FiiO BTR5 Portable High-Fidelity Bluetooth Amplifier
A quote from the article:
Today, we examine the FiiO BTR5 aiming to bring some wireless freedom back to wired headphones courtesy a mobile flagship DAC and amplifier SoC supporting Bluetooth 5 and LDAC. In fact, there are two of those for both a 3.5 mm stereo output and a truly balanced 2.5 mm output for higher power drive.FiiO BTR5 Portable High-Fidelity Bluetooth Amplifier Review