What is latest firmware?

On iXpand on iOS you goto Settings>about and you can see the firmware version you have.

How do you know you have the latest version? I know there is a tool but what is the latest version before having to reformat and run the tool?

the FW is pushed via the mobile app so if you have the latest app you will have the latest FW. 

Thank ou for the information. Watch similar videos on TubeMate and SnapTube.

Thank you. You can watch video on TubMate and SnapTube