Portable bluetooth jammer would shutdown his ear piece for bluetooth. I have seen them in conference rooms. Ear piece would work, but could not get input over wifi. Let them complain it would be proof they needed to cheat.
71 posted on 09/29/2020 10:48:47 AM PDT by OldGoatCPO
(No Caitiff Choir of Angles will sing for me)
77 posted on 09/29/2020 11:04:12 AM PDT by DarthVader
(Not by speeches & majority decisions will the great issues of the day be decided but by Blood & Iron)