Realistic FM Wireless Microphone & Receiver System, Model 32-1220A w/ Antenna. The receiver and microphone have some marks. The set works as it should. The microphone has minor corrosion in the battery compartment that does not affect the operation of the microphone. Please Note; The receiver only has a pre-amp output and will have to be connected to an amplifier, it has no built-in amp or speaker. Microphone uses 2 AA batteries (not included). Operates on 49 mHz. Includes original box and instructions.