Minelab X-Terra 705 Gold Pack Metal Detector Minelab's proprietary True Digital VFLEX technology the new class of single frequency detectors change the frequency easily by changing coils Compatible with low, mid and high frequency coils - all 7 X-TERRA accessory coils can be used 6 accessory coil options offer increased versatility Manual ground balance adjustment range is from 1 to 90 with automatic, beach, tracking and tracking settings True automatic Ground Balance eliminates false ground noises so you can hear elusive small gold signalsEffective noise cancel reduces interference Two Pinpoint Modes: Auto and Sizing; The new Sizing feature gives valuable information on target characteristics including shape and size