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There are serious security problems in public wifi, and the security of the network has been severely attacked by hackers. There have been many crimes using wireless networks. Faced with such threats, you may need wireless signal jammer devices to protect your information. https://www.jammer-mart.com/wireless-wifi-bluetooth-jammer.html Both WiFi and Bluetooth use the 2.4GHz frequency band for indoor tracking, which means that someone can learn your indoor location through hot spot location triangulation, similar to mobile phone tracking. Hackers can obtain your confidential information through the Internet, thereby violating your privacy. The jammer purchase store provides you with many wireless signal jammers that can help you protect your data privacy.