Bought it from eBay. It has excellent features and output power for only $109!
It's much louder than internal sound cards in phones and computers. And it supports extreme hi-res formats as well as UAC 1.0 mode for older devices and Switch.
The addition of a 4.4 mm output is also a plus.
With internal sound cards, a limiter is a must when using ATH-M50x (38 ohm impedance) if you want louder volumes with greatly increased bass through the music player and sound effect apps. And the ATH-M50x, despite low enough impedance for usage without this DAC, still needs higher power because it has double the impedance than headphones and earphones commonly have (which is ~16 ohm impedance on average) if you want to increase bass otherwise it clips, and you need to set up a limiter. This is plenty loud for all but the most demanding headphones.
Configured through the Eddict app. Set the buttons to change songs instead of volume and now I don't have to touch my device at all.
The battery drain is excellent - you can squeeze quite a few hours on constant music playback before you need a recharge.
5 stars overall. Don't look further. You won't hear a difference in different DAC/AMPs as they all sound the same basically (attested myself with using my IE 800 S and ATH-M50x and 5 DAC/AMPs). The detachable cable ensures you don't need to replace it if it dies (as that's the way my previous DAC/AMPs died), instead simply buying a spare cable and that's it (you can find cheap short cables on eBay if you look hard enough). You'll find the output power plenty enough. Can't ask more from such a small device at such an affordable price.
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