The "system," LW21000, sold at a big box with two wireless cameras and a DVR, is sold as supporting up to two additional wireless cameras- the LW2232PK2B. Getting the four camera system paired is another issue. The user guide is ineffective and the antennas require "line of sight." Can you imagine a four camera "line of sight" system application? So, get ready to buy a multidirectional system antenna and individual camera 20' extender antennas from Lorex at about $70 each. In short, this inexpensive system ends up costing more than their "expensive" cousins from other manufacturers.
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