I bought two at first, one for each antenna port to improve Wi-Fi on all cameras. But I have a camera on the opposite side of the house from the other camera. So I had a thought (I know, the awful truth). What if I only connected the two extension cords I bought to one antenna? This is how I did it and it WORKS! I had an immediate improvement in reception on all three cameras on one side of the house. Now I'm buying more so I can hook up another antenna to a lonely camera at the other end of the house to finally get a clear picture with no signal loss 75% of the time! Very happy with this purchase.
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