ST-522
| Brand | Stewart |
| Function | Radio Receiver (AM / FM / TV / Weather) |
| Produced | Late 1970's |
| Country | Hong Kong |
| Form Factor | Portable |
| Signal Path | Analog Hardware |
| Power | 9 Voly dry cell battery |
| Channels | 1 Channel |
| Connections |
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| Controls |
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| Notes | Came with a mono earbud and carry strap. |