We support non-MQA version Hi-Res for TIDAL Connect and TIDAL from WiiM App. It's usually in the resolution of 24bit/44.1k or 24-bit/48k. 

We just released the device firmware that supported Amazon Ultra HD from WiiM App. It can support up to 24bit/192k. For direct music cast from Amazon Music, we're releasing this to some of our Beta users. It can support up to 24bit/192k too. The public release of Amazon Music casting Ultra HD will be the end of June.