No.  | Item  | Description  | 
|---|---|---|
1  | Switch  | Used to reset to the factory settings.  | 
2  | Ethernet port  | Used to connect the Ethernet cable.  | 
3  | USB port  | Used to connect this option to the main machine. Do not use with other options.  | 
No.  | Item  | Description  | 
|---|---|---|
1  | Switch  | Used to reset to the factory settings.  | 
2  | Ethernet port  | Used to connect the Ethernet cable.  | 
3  | USB port  | Used to connect this option to the main machine. Do not use with other options.  |