| Image | Make | Model | Description | Price |
|---|---|---|---|---|
 | Pro Trucker | LT2N | Echo Board | $29.99 |
 | RC Electronics | RC3000 | Universal Talk Back Module | $44.99 |
 | Top Gun | SPA1 | Speech Processor | $49.99 |
 | Top Gun | MD1 | Top Gun Modualtor Board | $12.99 |
 | Top Gun | CP1 | Top Gun Compressor Module | $12.99 |
 | Workman | BB3 | Connex Style Echo Board | $29.99 |
 | Workman | BB2 | Echo Board | $34.99 |
