Generally, operation modes are defined as MOTION and NON-MOTION modes.Motion Mode: Search-coil must be moved (or swing back and forth) at a certain speed continuously to detect the target metal. The advantage of Motion mode is that metal categories can be classified and detected and the relative depth of the metal can be indicated under this mode. The weak point is that it is difficult to locate the buried things accurately. Moreover, it is inconvenient to move Search-coil in very narrow areas.Non-motion Mode: There is no need to move the search-coil continuously. Metal detectors will react as soon as Search-coil is close to the metal. However, under this mode, metal detectors could neither classify the categories of the metal nor indicate the depth of the metal. For example, if you are using a regular pinpointer, that falls into the non-motion mode.SuperEye professional featured metal detectors include both MOTION and NON-MOTION.