This is a case for an ESP32 A1S audio kit + a pair of 3W speakers. This can be flashed with squeezelite-esp32 for a squeezelite streaming music player, pair that with Music Assistant/Home Assistant and you have a fully open source multi-room audio system.
Parts:
Assembly
The author remixed this model.
Updated the lid to have mount points and room for speakers to be added. Added a music logo variant and one without a