This is a Yamaha model RX-300U stereo receiver. The serial number is E284637RT. It is in very good used condition. I tested it with a CD player on all the channels and a record player on the PHONO channel and they worked fine. All the speaker outputs and knobs also work. I couldn't get much other then static with the AM/FM channels but I have never received good radio signal in my house and I do not have an antenna. I was unable to test the Tape recorder outputs as I don't have a tape recorder but I have no reason to believe they are not functioning. Both AC outlets work fine. Please ask any specific questions before purchasing. Illinois buyers will add 6.25% sales tax.