Untested but this was well taken care of and stored for the last 40 years (worked when I put it away) no system to test

Thanks

John

The product is a genuine Tandy TRS-80 computer game cartridge featuring the popular sport of tennis. This vintage game cartridge, catalog number 26-3080, is a classic addition to any collection of TRS-80 games. Made in the United States, this tennis game offers a nostalgic gaming experience for enthusiasts of retro video games. Perfect for collectors or those looking to relive the glory days of TRS-80 gaming.