This is a model 06-32-56 8 transistor superheterodyne transceiver, made by MacDonald Instruments. This is a 49MHz walkie talkie. Channel frequencies are 49.860 MHz and 49.830MHz. It uses a 9 volt battery. It has two-position switches for call signal and channel selection. It comes with an instruction booklet. This unit was working, but has been in storage for several years. It is being sold as is as shown, with no returns accepted for any reason.