4 antenna desktop phone blocker video

Indoor desktop 4 antenna signal jammer

This 4-band silver mobile phone blocker is very popular. It is not only cheap in the industry, but also has excellent cell phone blocker quality and effects. This device may interfere with several frequency bands, and all cell phone signals may be protected. It only blocks the frequency of the downlink signal and will not affect the normal operation of surrounding communications. High reliability, long-term stable operation in various environments.

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