there is a communication system out there that has a wire with an “antenna” type device like on his wrist and a loop around the neck. this wire is connected to some type of hip or belt mounted battery pack???
I saw a diagram on it out there down some rabbit hole today.
I thought it might have been on the AWK video aquamarine linked to upthread, but couldn’t find it after I saw your question.
it’s out there somewhere. sorry I didn’t save it.
any help welcome on pinning this down
https://twitter.com/i/status/1311212631521284097
Someone posted a gif of his hand moving up; if it was a bracelet, it would not have stayed up when he raised his hand up to the position when the gif started; it would’ve slipped down earlier.