A person that is lazy but when they finally do something, they have to announce it over the radio. So everyone can hear what they did.
(Used in any business where the employees talk over a two-way radio.)
Employee 1: God!, I don't know why he is saying "we". He didn't do anything.
Employee 2: Man, you know he is just a radio-hand.
Employee 1: I know, he just sits in front of his laptop all day watching movies.