Sensitivity: a measure of the detector's signal strength. Higher sensitivity settings enable detection of smaller and deeper targets. Higher sensitivity also makes the detector more susceptible to electromagnetic interference and / or false signals in difficult ground conditions, so reducing sensitivity can help suppress interference and eliminate false signals and “chatter.”
Discrimination: ability of your detector to ignore, or to not register, metals of specific conductivity ranges. A low or zero discrimination registers all metals; increasing discrimination causes the detector to ignore metals of increasingly higher conductivity.
Notch discrimination: ability to discriminate out targets in a specific range, and still detect targets with conductivity below that range.
Pinpoint: allows you to determine the depth of small buried objects; it measures the distance from the center of the search coil to the target. Detects targets without the need for search coil motion.
Threshold: adjustable amount of normal background noise from your detector. You can increase or decrease audio output in order to maintain a quiet but audible threshold sound based on ground conditions and soil mineralization.
Target separation: how close the search coil has to be to multiple targets for the detector to register them as separate objects