There are a couple of options. You can get the chip and plug it in (99.00). You can get a down load for the GPS (99.00). You can get a down load for Garmin Basecamp (99.00) which will also load into your GPS(110.00 total for both). Or, get the downloaded app for your smart phone. This was free with an RMEF membership but not sure about the cost now. Remember for the phone that you have to save maps into memory or it won't work out of cell range.