USB power supply cable and three AAA batteries.
This versatile meter measures fields surrounding something as small as a cell phone all the way up to cellular phone base stations and power lines. The large color display shows all three parameters (EMF, Electric, and RF) simultaneously, including readings, bar graphs, and a trend graph. To increase technician safety, the bar graph is color-coded green, yellow, and red. When the bar graph reaches the red range, an audible alarm sounds.
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Comments about Extech EMF450 Multi-Field Electromagnetic Field (EMF) Meter:
The sensitivity for static magnetic fields is so poor that my iPhone with free app does a better job. The EMF interference feature doesn't tell you what frequency the interference is at, just that something is in the massive wide range of detection. Not really sure what this was designed for, but detecting problems in a building certainly isn't one of them.
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