In addition to 7 levels of correction, the collar has a beep only mode that is used for training. Levels 1-5 are a steady correction, where levels 6 and 7 are progressive. A progressive level means the correction starts out low and ramps up to a higher level. The correction levels are set on the transmitter itself, as opposed to being set on the collar. As mentioned, the correction level on each collar can be set independently. This makes the system ideal for multi-dog households that weigh 8 pounds or more.