Clearly see 2 clear prods with squiggly wire underneath, they likely shock the hand when he starts rambling, or could be constant electrical stimulation to stop him from falling asleep. constant jolts of electricity
could also be electric stimulation for hand after a stroke
Wireless electric prod his handlers can use when he deviates off topic or says the wrong thing.
That was my thought. He messes up, so it vibrates. Then suddenly Sleepy Joe wakes up, looks at the camera and says a talking point he has memorized.
https://twitter.com/RebeccaFaussett/status/1311188956109778944/photo/1
Clearly see 2 clear prods with squiggly wire underneath, they likely shock the hand when he starts rambling, or could be constant electrical stimulation to stop him from falling asleep. constant jolts of electricity
could also be electric stimulation for hand after a stroke
He didn't need that. He had Chris Wallace to do that for him.
I think that this is the most likely explanation.