The Host device check option loads a utility (shown below) for accessing details related to the peripherals attached to the host system.

This utility can be useful when trying to determine the device path of physical devices.  For example, when connecting a physical disk to a virtual machine.  It is also useful for discovering the SCSI path details when configuring a GK type object.

This utility can filter the devices shown by changing the value of the Device class dropdown box.  It is also possible to save the information to a text file, using the Save As... button.  Previously saved data can also be display by using the Open button.