The Mel-8704R-MADD adds different dimensions to paranormal investigating. This meter measures not only EMF and ambient temperature, but the MADD (Magnetic Anomaly Deviation Detection) also detects changes in the Earth’s natural geomagnetic field, which differentiates it from the man-made EMFs detected with other meters. It also shows the polar fluctuations with both audible sound and green/red LED color. The sensitivity of MADD can be set with a 5 step adjustment according to personal preference and to assist in ruling out false positives therefore enabling you to get more out of this meter than a standard meter. The Mel 8704R MADD also has a red backlight display with an on/off button and glow in the dark push buttons.