Do you want to see the difference between the STD and PRO modes? That’s what the top secret of the Garrett AT PRO is. Watch the video: AT PRO recovery speed test.
But the STD mode in the Garrett AT PRO isn’t so useless (at least for me). When in this one, I shoot my videos (for the sound to be heard). And there are finds when in the standard mode as well. But if you want to get the most out of your AT PRO, you should use the PRO mode + headphones then.