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External antenna cable for the nüvi® 275T, 1370T, 2370LT, or 2475LT
The separate cable that is packaged with the nüvi® 275T, 1370T, 2370LT, and 2475LT is designed to plug into the GTM Traffic Receiver that powers your device. This cable can be used to increase the receiver's ability to pick up a traffic signal in areas where the signal may be weak. This can be the case in some European cities where the signal is not as strong.