Difference between MTSKR1905WF and MTSKR2005WF, can I use MTSKR2005WF on Efoil/Esurf?

MTSKR2005WF is designed only for electric skateboard application, please do not use for electric surfboard. 

Difference between MTSKR1905WF and MTSKR2005WF, check below chart:

Can I use the MTSKR2005WF on electric surfboard?

No, MTSKR2005WF only has Esk8 mode, don't have Esurf mode, no cruise control mode; Besides, MTSKR2005WF remote is only IP67 waterproof, enough for electric skateboard usage, but not enough for electric surfboard, MTSKR1905WF inside circuit is not only with glued, but also with nanometer coating double waterproof, and the screen is with 2 layers waterproof screen; At last, the throttle Zero is different, can't compatible with Esurf application.