They don’t appear to be have ever been used.

Fully tested and I’ve replaced the glass fuse inside with a new one.

The Vintage Tandy 42-7152 Pulsing Disco Lights are a retro disco party rave lights setup perfect for adding a nostalgic touch to any event. This unit, with the model number 42-7162, is a single piece of equipment that brings a unique and fun atmosphere to stage lighting setups. The pulsing disco lights create a vibrant and lively ambiance, ideal for DJs and music enthusiasts looking to throw a memorable party.