“does this back up camera have sonar to detect obstacles?”

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• no

  Answered by crazylegs 10 years ago

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• The BC 20 Wireless backup camera that comes with the 2798LMT does not have a proximity sensor to detect obstacles. The camera has visual guidance lines which can be adjusted. The following link offers training videos regarding the BC 20 http://www8.garmin.com/learningcenter/on-the-road/backup-camera/

  Answered by GarminProductExpert 10 years ago

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