Precise navigation meets global communication in the rugged GPSMAP 66i Handheld GPS and Satellite Communicator. The button-operated Garmin GPSMAP features TopoActive mapping and inReach technology to give you a powerful tool for navigating safely in remote terrain. Familiarize yourself with the terrain before you arrive with preloaded TopoActive maps of the U.S. and Canada. You'll get maps as pretty as a picture, just as detailed-and without a subscription. When cellphones can't connect, inReach can. Communicate with confidence using inReach technology (satellite subscription required). With inReach, you can trigger an interactive SOS to the GEOS 24/7 search and rescue monitoring center and communicate via two-way messaging using the global Iridium satellite network. And compared to other Garmin GPSMAP 6 Series Handheld GPS units, you can stay out there longer with 66i. That's because it's equipped with a powerful rechargeable lithium-ion battery that gives you up to 35 hours of battery life in tracking mode and up to 200 hours in expedition mode. That's over double the battery life compared with other Garmin GPSMAP handhelds that use AA batteries. inReach-compatible. Communicate from anywhere. Using the worldwide coverage of the Iridium satellite network, this go-anywhere portable device lets you exchange text messages with any cell phone number or email address from anywhere. Or use the GPS to track and share your journey's progress. You can also post to social media, or even communicate inReach-to-inReach while in the field. In case of an emergency, you can trigger an SOS distress signal to a monitoring center, text back and forth about the nature of your emergency, and receive confirmation when help is on the way. And no worry if you're not within range of a cell tower. inReach technology works anywhere and everywhere-so you're never out of range.