I recently put my Garrett AT PRO up for sale. Not because the device is bad, you just have to go further, take a top and use solid professional equipment. Today, after a cop on Sunday, I lay down to take a nap and suddenly a call came from an ad: «What is the difference between the Garrett AT PRO and the Garrett ACE 400i?». True, it was said «Garrett ACE 400I», but the second time I understood what he meant.
I hope this helps you deal with the new Garrett!
And I collect everything about the new Garrett ACE 400i device here. Any questions — write in the comments, we’ll all help together!