Samsung's Galaxy Buds series already offer a range of high-end TWS technology. Now, it has emerged that their next generation might come with something besides the usual charging case that keeps them completely untethered during use. It is a new accessory that defeats this purpose somewhat, although the potential use-cases possibly implied by the new design might make up for that.
https://www.notebookcheck.net/Samsung-patents-next-gen-TWS-earbuds-that-also-convert-into-potentially-waterproof-neck-buds.560878.0.html