A USB cable bracelet is an accessory that can be worn on the wrist like a regular bracelet while also functioning as a USB charging/data transfer cable.
As shown in the photos below, there are various types of bracelets depending on the fastening method and port configuration.

Various types of USB bracelet cables
This is a directly fastened type with a USB Type A - USB Type C configuration.

The fastening method is the same, with a USB Type A - Micro 5 Pin configuration.

This is USB Type C - C.


The fastening method is a little different, and this is a USB Type C - C configuration.

This is how it looks when worn directly on the wrist, and in general there are two length options: 20 cm and 22 cm.


Brief usage review
The length was somewhat short, so there were a few limitations when using it as a data transfer or charging cable, but I think that was an unavoidable choice to make it usable as a bracelet for the wrist.
Of course, it could have been made longer by allowing it to be wrapped around more than twice, but that might have had aesthetic drawbacks.
In practice, fast charging was fully supported when charging with Type C-C and Type A-C, and data transfer speeds were also sufficiently fast.