There are 5 individual sensitivity steps that
you can use. Each time you press the range button, an LED on top will blink
indicating the sensitivity setting selected.
Level 1 = RED is the default (least sensitive)
Level 2 = PURPLE, RED
Level 3 = BLUE, PURPLE, RED
Level 4 = YELLOW, BLUE, PURPLE, RED
Level 5 = GREEN, YELLOW, BLUE, PURPLE, RED (most sensitive)