Do you have a question about the Rosewill RC103 and is the answer not in the manual?
The internal USB 2.0 port (UJ5) shares functionality with the first external USB port (UJ1).
| Model | RC103 |
|---|---|
| Type | USB to Serial Adapter |
| Ports | 1 |
| Chipset | Prolific PL2303 |
| Connector A | USB Type-A |
| Connector B | 1 x DB9 Male |
| Power Source | USB Bus Powered |
| Operating System Support | Windows 7 |
| Category | Adapter |