Install the iUSBport app on the iPad, https://itunes.apple.com/us/app/iusbport/id581463199?mt=8
Tap the "Settings wheel" icon next to the "iUSBport-1", and the firmware version will be displayed
Or, open up the Safari / Chrome browser. Key in the default IP address "192.168.0.1" when the iUSBport is connected to iPad or iPhone in Ad Hoc mode. Tap the "Settings Wheel icon" at the lower left corner.
The firmware version is listed in next window.