TK 7.0

[SWOgburn]

Hello,

I've built scale models all my life, but this is my first RC tank adventure.

I just purchased an Heng Long 1/16, Tiger 1 (HL 3818). It comes with a TK 7.0 control board with 2 available sounds. Is that normal? Can it be upgraded for more sounds? I have seen other options that come with 4 sounds. Other than the obvious 2 additional sounds, what is the difference?

Can someone please explain?

Thank you,
Stephen

[SWOgburn]

I apologize for the post. I can see that it is broad and unclear. Like I said, this is my first time with RC tanks, but I believe I'm learning.