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The interference range of the same shielding device used outdoors will be doubled than when used indoors. If the interference range is less than 200m, a shielding device is generally installed, which can be hung on the indoor wall with a distance of 1 to 1.8m on the ground; if it is greater than 200m, generally Two or more units should be installed, placed on the front and back walls; if the interference space is outdoors and greater than 1000m, multiple units should be used, and the honeycomb distribution effect is better.

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