| -a | Show all items. |
| -f device |
| | Specify a path name for the device to operate on. |
| -l | Loop and dump the device data every time it changes. |
| -n | Suppress printing of the item name. |
| -r | Dump the report descriptor. |
| -t table |
| | Specify a path name for the HID usage table file. |
| -v | Be verbose. |
|