My frustration with WIIM devices has just about run out! Start with the MINI moved up to the PRO and started to have sound issues like the sound breaking up and other issues. I sold that and purchased the Plus and once again here we go with problems. The problem here is the device seems to change to wifi when selecting between the two EQs. I run optical as input and can no longer get it back to optical. If I change the input from wifi to optical it turns on the PEQ if I turn that off the sound goes off it changes the input to wifi. And this is just a continuous loop. The app says I'm on optical but if I open it up wifi is selected. How does in house testing release these buggy devices. My last return date is the 18th so no answer I'm forced to return it.