Upgrade MAX-HD4-LTEA-W-T to 5G

Hello all,
Quick question.
What do I need to upgrade tfrom my existing unit?
Would it be this item? HD2 MBX 5G

Thanks in advance

Or could I do it with this item ? EXM-MBX-T4-5GD

I suggest getting help from local Peplink partner. They will go through with you carefully for your requirements. It seems like HD4 MBX will be your choice.