With this option, the VMkernel is configured without the respective device under its management, while it is passed through to a virtual machine.
This virtual machine takes full control of the device. As it has full control of this hardware component attached to the server, it cannot be vMotioned to a different server. In addition, other servers do not have the ability to remotely access the device or hardware.
USB device passthrough
This option allows you to redirect I/O to or from a USB device for virtual machines.
The device is managed by the VMkernel, allowing the attachment of USB devices to virtual machines live, and maintaining vMotion capability.