hope this help...
https://audiobacon.net/2018/02/02/chord-poly-review-rediscover-mojo/
I still question the convenience and practicality of carrying the Mojo-Poly as a mobile audio player. Aside from its inability to browse and select music easily, it is bulkier than a cell phone or smartphone, which 99% of travelers and commuters already carry. Paired with a capable dongle and good headphones, you can enjoy nearly the same audiophile-grade experience on the go. Even if you don’t stream, a phone with large built-in storage—up to 512 GB—should be more than sufficient for a substantial music library compared to a microSD card. You can also use Roon ARC on a mobile device to access your Roon library.