This listing is for "ONE" Airtronics Sanwa 72MHz FM, Tx Rf module without case. These are perfectly functioning but have no cases or crystal. You can use as is in any Airtronics "Modular radio such as Module, Spectra, Quantum, Vision, Infinity. They will require a crystal of your desired channel number. I do have a small selection of crystals also. You can use these Rf modules in your Airtronics radio or use them for a DIY project. They have all been tested and are fully functional. 100KHz wide spacing. I show 4 units but have more.

Module comes with no crystal but I do have some Tx crystals for $15 extra if I have the Ch# you want.