The Five Scales:
(1)The 1st Light detects a Normal EMF field, what is always around us.The range is between 0 to 1.5 mG
(2)The 2nd Light (GREEN) detects a Low Level EMF,which range is between 1.5 to 2.5 mG.
(3)The 3rd Light (YELLOW) detects a Mid Level EMF in the range between 2.5 to 10 mG.
(4)The 4th Light (ORANGE) detects a High Level EMF field in the range between 10 to 20 mG
(5)The 5th Light (RED) detects an Extremely High EMF Range of 20+ mG