Vintage Radio Shack TRS-80 color computer and computer cassette recorder.All I can tell you is when I plug computer in and turn it on when you put your ear up to it I can hear a hum . The cassette when plugged in works. It has been stored in my attic in a box for around 35 years and worked when it was put away . Like I said I don’t know much about it . It is a as is sale . Comes with cords and manual. If I remember right you need one of those little converter boxes to plug it into and then it connects to a TV. I don’t know if it will work with the TV’s we have today or a old picture tube TV. Shipped with USPS Priority Mail.