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Necessary personal jammer with jamming radius 1-10 meters

Signal jammers are high-tech products to protect privacy and personal security; signal blockers with an interference radius of 1-10M are the most basic entry-level devices, which can generally interfere with mobile phone signals, WiFi signals or GPS signals alone, but they The interference area is small, suitable for personal protection without affecting others, so it is often called a personal jammer. Loved by beginners or DIY users because they are light and easy to carry, simple and practical and inexpensive!