Sharing of selection methods and precautions for mobile phone signal jammers
Shop around to select products and conduct extensive research to learn more about:
1. Investigate product quality, technical means, brand, etc.;
2. Through Internet search, initially understand and communicate with technical personnel, and listen to technical instructions;
Prison demonstration to see the effect:
Select a few and go to the site to test and demonstrate the shielding effect;
The...
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