A three in one handheld that arrives with a calibration certificate, which is rarer at this price than the marketing suggests. It measures magnetic field on three axes so orientation stops mattering, electric field in volts per metre, and RF up to about 8 GHz. Backlight, hold and max functions are on the keypad, and some versions ship in an aluminium case with the probe and manual. Street price generally sits near one hundred thirty dollars.
The three axis sensor is the practical argument for it: sweeping a corridor does not require twisting the wrist to find the peak. Response is steady rather than twitchy, which suits documenting a baseline more than catching a half second flicker. Ghost hunting teams tend to use it as the reference meter of the kit and leave the dramatic LED gadgets to the walkabout.
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