Precise navigation meets global communication in the Garmin GPSMAP 66i button-operated GPS handheld and satellite communicator. Know the terrain before you're in it with preloaded TopoActive maps (Australia and New Zealand), plus inReach technology. With its high-sensitivity receiver and multiple global navigation system support (GPS, GLONASS and Galileo), the GPSMAP 66i locates your position quickly and precisely, and maintains your location in more challenging environments than GPS alone. It supports BirdsEye Satellite Imagery so you can download high-resolution, photo-realistic maps directly to your device without an annual subscription, and offers 16GB of on-board memory and a microSD card slot for expandable storage so you can conveniently download even more maps. Two-way messaging, interactive SOS alerts and location sharing keep you accessible in the field, and you can stay out there longer with up to 35 hours of battery life in Tracking mode and up to 200 hours in Expedition mode.