Using the EMF Meter allows you to move furniture or appliances to make sure they are in a safe place
Now that we are surrounded by it it helps to know where the high fields are so that you can move bedisde lights, clock radios etc. to a safe distance from where you are sleeping. This also applies to play areas and general living spaces. It's useful to measure the fields from your computer desktop or tower so that you are sure you are sitting far enough away that it isn't affecting your body.
The EMF professional meter tells you what the safe levels are and displays the level of electrical and magnetic fields of the item you are measuring.