Yes they are all marked I think the one your looking for, with the radio front facing you, radio upside down, it's close to the front of the radio right side. I think it says AM Mod. Most of the Optimas I have had are tuned very well. Not sure why you would want to turn anything up but we all like to look. The 257 chassis had it in the right front corner so this one is kind of the same place. I was quite surprised to see everything marked, nice touch and in english also not some crazy chinese writing like the BR-9000 that I had.