Referee Headset 2 Referees Full Duplex Football Wireless Headsets Wireless Football Headsets Headset Football Referee Communication

In the description it say they are wireless, yet the picture shows a wire running to the receiver, which is more accurate?

What wipes do you use to clean the earpiece?

I bought 2 sets will all 4 pair together?

if i bought two sets.... can they be paired so all 4 are on the same "channel" and can all speak to each other.... i want 4 total devices?