Advanced GQ EMF-390 Multi-Field, Multi-Function EMF Meter

and RF Spectrum Power Analyzer

Probably the best Options for Targeted Individuals for Price and Specifications $120 

Why? To identify incoming Signals/ Safety & then what frequency signals to try to block....

HOW TO BLOCK AND JAM SIGNALS....

https://www.targetedjustice.com/v2k.html

ADF4351 35M-4.4G RF Signal Generator PLL Sweep Frequency Generator Touch Screen

https://www.ebay.com/itm/293540926223

Always  > DO YOUR OWN RESEARCH