Questions about Sony Nw-E393

Hello, No, it doesn't support FLAC audio format. It supports MP3, WMA, Linear PCM and AAC audio formats. Sony Support.

Since it does not have Bluetooth, this should not work. https://www.sony.ch/de/electronics/support/digital-music-players-nw-nwz-e-series/nw-e394/specifications How about one of the following https://www.digitec.ch/de/s1/producttype/mp3-player-21?pdo=64-12056%3A3624&tagIds=591-550

Yes, the audio connection is directly for 3.5mm without an adapter.

No, there is no possibility to use Spotify on this model. There is a software to sync with pc.

Hi Damian Yes, the player has the function to play a song endlessly. It can also be charged from a mains socket, you just need a suitable USB adapter. Greetings

No.

No, unfortunately not.

Hello, Unfortunately not, the mp3 player has no internet connection :/

Yes

No, there is no microphone.

The unit switches off automatically when not in use and also has a sleep timer. Here is the manual: https://docs.sony.com/release//Help_4579798111.pdf Most MP3 players should switch off automatically when not in use.