Have peace of mind and confidence in knowing where this body penetrating pollution is coming from, and how powerful it is, so you can protect yourself and loved ones. Instruction booklet and 9V battery included. One year limited warranty. Made in U.S.A.The TriField Meter is the only one which combines magnetic, electric, and radio/microwave detection in one package. This meter combines all these unique features with affordable pricing for fast, reliable measurements of electromagnetic pollution: Continuous sampling analog readout; Omni-directional electric & magnetic sensitivity; Two separate scales for magnetic field readings; Hand-held portability and simplicity. The TriField Meter will accurately measure EMF pollution from these "hot spots" in your home, office, or work environment so you can take steps for "prudent avoidance":* poorly grounded wiring* microwave oven doors* dimmer switches* cellular phones* FM transmitters* automobiles* TV's & computers* other electronic equipment. This modified version of the standard Trifield Meter has all the same specifications with this one important difference: magnetic field response is NOT frequency weighted. No need to specify 50 or 60 Hz calibration.