The unit has worked flawlessly until the power supply went out. Thus, we sent out to United Radio and they replaced the power supply as well as performed the AV8802 2.2 Upgrade which now makes it an AV8802(A)!Software or firmware was upgraded to newest version and the unit was set back to factory default settings. Quality Control performed full function test and United Radio guarantees the service performed and parts replaced for 6 MONTHS! We have included the service receipts , along with all of the original contents, box and packaging which includes original factory remote, NEW calibration microphone, and NEW power cord. Still sealed in wrap from Service Center! The item "Marantz AV8802A Network A/V Pre-Amplifier" is in sale since Wednesday, December 23, 2020. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Receivers". The seller is "lnsparks4l0i" and is located in Benicia, California. This item can be shipped to United States.