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| ANT+ | Further enhancing device functionality, ANT+ is the wireless technology that enables all compatible Garmin devices to communicate with each other and multiple external accessories, allowing users to share information in the field while additional information is displayed and recorded for future review. |
| Bluetooth | Now you can wirelessly share larger files (up to 50 times faster than previously possible with ANT+) such as photos, geocaches, adventures, routes and Custom Maps with other Bluetooth enabled Garmin GPSr. Receive smart notifications (emails, texts, alerts) and share data with compatible smart phones/tablets running Garmin Connect. You can even share LiveTrack location data. |
| Wi-Fi | New to the GPSMAP series, Wi-Fi capability makes it easier than ever to download software updates, view Active Weather forecasts, or access Geocaching Live data without making an impact on your mobile device data plan. |
| Share Wirelessly | Send and receive waypoints, routes, tracks and geocaches wirelessly with compatible Garmin devices. |
| Chirp | Use your GPSMAP 66i to discover a Garmin chirp and retrieve hidden information placed by others. |
| Tempe | ANT+ wireless temperature sensor designed to provide the current, minimum and maximum temperatures over a 24 hour period. |
| VIRB Remote | Garmin's VIRB action cameras can be remotely controlled from up to 10 meters. You can start and stop video recording and take still photos right from your GPSMAP 66i. While recording video, the record time will be displayed in the status area on your GPSMAP 66i. |
| Speed + Cadence Sensors | Monitor your speed and pedaling cadence as you ride with these self-calibrating, wireless speed/cadence sensors. They measure and report your speed and pedaling strokes per minute, providing feedback for optimal performance. |
| Heart Rate Monitor | Train more effectively with a Garmin heart rate monitor. When worn around your chest during any activity, it wirelessly transmits your heart rate to your compatible device for instant feedback on how hard you’re working. |
| inReach | Use inReach technology (subscription required) for two-way messaging and LiveTrack location sharing from anywhere on the planet, or for sending an SOS to a GEOS 24/7 emergency response team. |
