this a case for a dw-ct14 with 2 speakers inside it.

dw-ct14 is a chip that supports bluetooth audio and usb audio.

you can buy one here: https://nl.aliexpress.com/item/1005002601087245.html?src=google&aff_fcid=e7f13ae899cc4cbf879f99b669fb80b7-1641137601696-00478-UneMJZVf&aff_fsk=UneMJZVf&aff_platform=aaf&sk=UneMJZVf&aff_trace_key=e7f13ae899cc4cbf879f99b669fb80b7-1641137601696-00478-UneMJZVf&terminal_id=a4384afe5d7f4d4a9e9f254dd320b9c0

The speakers are around 39 mm

the case is made in fusion 360.

Made by Fabian.