Zach Smart displays the CONTROL Piano Hands.
Device which attaches to an agent's fingers making them appear to be a piano virtuoso.
The CONTROL Piano Hands are completely undetectable. They contain digitally-activated neuro-switches that, as Zach Smart explains, can play everything from ABBA to Zappa.
[GS95 Episode #4: "Shoot Up the Charts".]
Use of the Piano Hands presumably supersedes the need for the Computer Piano previously used by Zach's father Maxwell Smart [Episode #113: "Pheasant Under Glass"].