“Is this camera compatible with older Defender units such as model # 21150?”

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• Yes, this compatible with model # 21150.

  Answered by CommunityAnswer 8 years ago

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• Thank you for your question Don. DefenderHD cameras are compatible only with DefenderHD DVRs. Unfortunately they will not work with models like the 21150.

  Answered by Defender Customer Support 8 years ago

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