This meter has all the normal features of the MEL8704 including the EMF meter, Temperature probe, flashlight and the other standard features. This model has a new feature. This new feature detects subtle Ambient temperature changes in the environment, and converts the Hot and / or Cold change into an audible and visual alarm. Each degree change produces a unique tone. There is a one Octave step for each degree change which allows the user to quickly differentiate any temperature change even without looking at the display. Blue LED’s are used for a temperature decrease, while Red Led’s are used to show any temperature increase that occurs.