I really can't think of too many DACs out there that do non USB either tbh. My issue with USB and portable are I've been using a dx80, nothing leads me to believe it can do USB out to a DAC. My experience with multiple android phones and usb DACs like Fiio have led to the conclusion that, even WITH usb-c (which doesn't require any special circuitry/software for usb out on a phone/tablet) android+USB is VERY hit and miss at best and again, either I use my phone (which is VERY hit and miss with usb sound) or I buy a DAP and a lot of them are android, so again, I don't trust it. Honestly it is a problem I know. A lot of DACs i've researched I've cut off the list due to lack of non usb input, but the way it stands I have no way of feeding a USB DAC musical information on a reliable basis on the go. Alternatively I could just sell my DX80 and get a $1000 DAP like AK300 or something.