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Unfortunately, Night Owl is not able to guarantee compatibility with any 3rd party brands. We can only ensure that our products will function with compatible Night Owl products.
Sorry, there was a problem. Please try again later.I used my existing BNC & power wires to upgrade from an old Night Owl system to a new 1080p Night Owl system and everything works fine. Not sure what the defender system is but should work if the BNC and power connections match up.
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