Flashable board?

[SecureZone]

I am trying to determine how to upgrade the firmware on my board.  Below are the model and serial number I am able to see.
Model 20A01 - (handwritten 21) 
054000048-C8
Can someone please confirm whether this is a flashable model or not?
 
Thank you

 

[edge]

A pic would be good to verify, but rule of thumb, if you see 5 serial ports marked 1-5 on the top left of the board, yours is flashable

 

[SecureZone]

Thank you.  It only has 3 serial ports.  I assume it is not flashable