Optimus CD Player With Unified Remote CD-5500

The Optimus CD-5500 is a single-disc CD player that was sold by Radio Shack, first appearing in their catalog in 1994. It is a component in the Optimus home audio system line.

Key Features & Information:
Brand/Manufacturer: The Optimus brand was an in-house brand for Radio Shack.
Type: It is a home audio, single-box CD player component, designed to be part of a larger stereo system.
Connectivity: It features standard audio outputs and a "DigiLink" connection for use with compatible Optimus receivers, such as the Optimus STA-7500.
Control: The front panel has basic controls, but full functionality and control (e.g., as part of a system) were typically managed via a system remote control, which was often included in the original packaging.
Functionality: Reviewers have noted that it plays CDs reliably and has a good headphone output.
Common Issues: As a vintage item, a common issue reported by users on forums is that the display may cease to work over time, which is related to a specific voltage requirement for the Vacuum Fluorescent Display (VFD). 

Remote requires 2 "AA" batteries.

Here you find 2827 models, 2758 with images and 167 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Radio Shack (Tandy, Realistic, Micronta); USA