GARRETT GTI 2500 Overview: While you're treasure hunting it's fun to imagine what you might find: a bag of coins, jewelry, war relics, or even a nugget of gold. Only Garrett's patented Graphic Target Imaging (GTI) technology lets you "see" what's really buried below. Most metal detectors can only determine a target's depth (if it's a coin) and the kind of metal its made of. However, the GTI goes a step further and also reveals the target's true size and true depth (no matter what the target is) via a unique, user-friendly graphic Imaging display. Sophisticated information like this is invaluable, especially when a detection signal can be attributed to any one of several similarly conductive but different sized objects. For example, a coin, a screw top and a drink can will all trigger a penny signal. Without size information you have no idea what the target really is until you dig it up. The Garrett GTI 2500 metal detectors ability to determine a de