I need RF remotes for two different zones (patio and my family room, which are separated by 20 feet or so)-can two of these remote/base station combos coexist in the same house without interfering with each other? I think the answer is no, but I wanted to see if anyone here knew for sure. Also, does anyone have experience with RF remotes as potential interference sources for WiFi LANs, cordless phones or other wireless home systems? TIA.