This is a classicOptimus STA-20 AM/FM Stereo Receiver. This “mini” receiver was a popular RadioShack staple in the early 90s, known for its compact footprint and surprisingly versatile feature set.
Optimus STA-300 AM/FM Stereo Receiver Digital Synthesized Radio Shack 31-1991
Optimus STA-300 Digital Synthesized AM/FM Stereo Receiver (Model 31-1991) made for Radio Shack/Tandy. Unit needs a new power plug/cord attached before use. Being sold as-is for repair, restoration, or parts.