The Vintage Target PlannerCalc with 5.25" Floppy Disk is a retro computer accessory designed for use with the RadioShack TRS-80 Model 4. This product allows users to store and transfer data on a 5.25" floppy disk, providing a unique and nostalgic way to work with their computer system. The brand association with RadioShack adds authenticity and historical value to the product, making it a sought-after item for collectors and enthusiasts of vintage technology. Good vintage condition. Thanks for looking. Don’t hesitate to make a reasonable offer