Review on Fosi Audio K1 Bluetooth 5.0 DAC Headphone Amplifier Mini Stereo DAC Amp & Preamplifier 🔊 - 24-Bit/192 KHz USB/Optical/Coaxial to RCA AUX Digital-to-Analog Audio Converter Adapter for Enhanced Home Audio System by Larry Blanco

Tried the more expensive Auris BluMe HD. Very close. The Bluetooth sound quality was actually quite good. A little more bass from Auris. The Auris also has better headphone sound, but the Auris doesn't have a volume control and the output audio is a bit weaker. Fosi has good headphone volume. The inputs/outputs and displays are placed strangely. The status LEDs are on the back, should be on the front. RCA outputs on the front panel. Many inputs, but only RCA. It would be nice to have an optical output like the Auris. USB charging cable included but no wall wart. Additional USB cable for PC connection and optical cables included. All in all a good value at $50.