This pulse induction (PI) metal detector has a fully automatic ground exclusion balance (AGEB), which makes it very easy to use, even beginners can use it successfully. It also has excellent depth and stability thanks to its new Smart Tune Technology. For the experienced users and for maximum depth of detection, the Pro 7SE has also manual ground balance, set by a 10-turn fine tuning potentiometer (helipot).The Pro 7 features a TRASH REJECT function to choose what the detector reacts on - only large targets or all size targets. With the Auto Ground Balance the machine tracks the ground in real time, the user is not required to set the ground balance. The type of metallic objects is identified by two LEDs: red for non-ferrous metals and green for iron and other ferrous metals.