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The 10-channel mobile phone signal blocker is a green and environmentally friendly mobile phone signal blocker, which only blocks the reception of the mobile phone on site and has no impact on the surrounding base stations. This machine adopts 10 channels of output, which can shield all kinds of mobile phone signals in the range of 1-4 meters (depending on the signal strength of the base station) in domestic and foreign mobile phones; contact was completely cut off.
https://www.dojammer.com/tx-x10-signal-jammer.html