This item is for the latest Garmin Software update installed onto a Garmin Proprietary Chip ( the older black chip, see pic )
You Must provide the Garmin GPS model when ordering and the software version you are currently running on your unit.
Please also provide the version you are looking to upgrade your unit to. This update works by plugging in the chip, and powering on the unit.
The gps will see the update chip in the slot and automatically upgrade the software. The Garmin proprietary chips are not being manufactured anymore and are hard to come by.
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