General Radiotelephone Company Vintage Control Box. This radio is a crystal radio. It does turn on. It does pull in people speaking on it. It operates on 110 AC volts this model could work with a 12 volt system, but I’m not sure if those components are in this particular model. It does come with a provided antenna that plugs into the back. It also comes with an owners manual dated 1964. It is clean inside and out. The mounting bracket can be mounted either on the top of the unit or the bottom of the unit provided the latch mechanism is turned around. The transmitter rubber coil cord is in very good condition. The radio unit has TEN crystals in it.