Avoid Eversolo. Their support , if you can call it that , is their forum. They have no repair facility but they will have your dealer replace it within a year.
My Dads A6 stopped recognizing his DAC 5 days before warranty was up. Auto update killed USB. Solution? Roll back firmware and wait for next FW. 3 updates and 5 months later still no USB.
Aurender is the best support I've ever experienced. I've used innuos and its a good machine too. Don't waste your money on Eversolo. The hardware may look great and sound good but as a company they suck.