The 4100 Series accurately measures Extremely Low Frequency Magnetic Fields generated by electrical equipment. Applications include detecting magnetic field emissions from a wide variety of sources, including video display terminals, AC power lines, office equipment, household appliances, and all types of electronic equipment
K**H
Does what tech support said it would do - it's just what I need.
The product works fine, quality of product is okay, the packaging and accessories are minimum (no ac adapter included), but overall the product is fine.
