This is a working MEGO 1974 Star Trek Communicator Walkie Talkie with CB Band and flip up communicator button with communicator sound. This is a single unit. It operates on the Citizen’s Band, and thus with the antenna extended you can listen to truckers and others using cb or even start a conversation. Or of course, talk to someone else with a Star Trek communicator. The volume control makes a squelching communicator sound until it is halfway up, then the sound clears and you can listen in to conversations or have one yourself. The antenna should be fully extended. I have disclosed all issues; for a 1974 product its in great shape.