To clear things up, There is no "Fisher Gold Bug 2 Pro". There is a Fisher Gold Bug 2, and a Fisher Gold Bug Pro. These are two very different metal detectors. They are both designed for finding Gold Nuggets but that's about all they have in common. The GB2 runs at a very high frequency, something like 79 kHz. This allows it to find itty bitty specks that other detectors can't. These specks are much smaller than you'd consider a "nugget". The down fall is that the high frequency reduces the depth that the GB2 can see larger nuggets, like 1/4 to 1 ounce size nuggets. The GB2 also has no meter or discrimination and is best used only for nugget hunting.
The Gold Bug Pro has Dual Processors and runs at 19 kHz. The GBP a meter that shows target ID numbers, and depth. It also has Discrimination so it can be used for Coin & Jewelry hunting as well as nugget hunting. The GBP won't find specks as small as the GB2 but will find larger nuggets at greater depth, and the GBP makes a great dry sand beach detector.
