Shokz OpenSwim Pro. Waited for years for these to come out. The jump from 4GB -> 32GB sounds great, until I found out that whatever decoder chip they are using doesnt support folders. So you are expected to put 32gb of mp3's on the device (since bluetooth doesnt work under water when swimming), and then navigate file by file. Insanity.
This is great to use old-school tools. What really rubs me the wrong way is how manual it is to setup/configure/deploy. Things like this run great for years until they don't, and then you are left walking through the entire setup process again to debug things.