This handheld is built to military standards for thermal, shock and water performance (MIL-STD-810), and it’s even compatible with night vision goggles. The GPSMAP 66 series helps you keep gear to a minimum with a built-in LED flashlight that can be used as a beacon to signal for help. Plan, review and sync waypoints, routes and tracks by using the Garmin Explore mobile app and website. You can even review completed activities while still in the field. Features: BATTERY LIFE Turn on Expedition mode, and get up to 200 hours of battery life while using inReach technology. In the default tracking mode, you get up to 35 hours of battery life, and your device will save your location every 10 minutes. MULTI-GNSS SUPPORT Access multiple global navigation satellite systems (GPS and GALILEO) to track in more challenging environments than GPS alone. ABC SENSORS Navigate every trail with ABC sensors, including an altimeter for elevation data, barometer to monitor weather and 3-axis electronic compass. BIRDSEYE SATELLITE IMAGERY Download high-resolution, photo-realistic maps directly to your device without an annual subscription. Easily find trails, pick stand locations, find parking, create waypoints and more. PRELOADED TOPO MAPS Preloaded TopoActive U.S. and Canada maps show you terrain contours, topographic elevations, summits, parks, coastlines, rivers, lakes and geographical points. WIKILOC TRAILS This preloaded app lets you easily download hiking, cycling and other Wikiloc trails shared by outdoor enthusiasts like you. Get a free 60-day Wikiloc Premium trial to try this and other exclusive features. Learn more. TWO-WAY MESSAGING Exchange text messages with loved ones, post to social media, or communicate from inReach to inReach in the field (satellite subscription required). INTERACTIVE SOS ALERTS In case of emergency, trigger an interactive SOS message to the Garmin IERCC, a 24/7 staffed professional emergency response coordination center (satellite subscription required). LOCATION SHARING Track your location, and share it with those at home or out in the field. They’ll be able to see your progress or ping your device for your GPS location and more (satellite subscription required). 100% GLOBAL IRIDIUM® SATELLITE NETWORK Instead of relying on cellphone coverage, now your messages, SOS alerts and tracking are transferred via the global Iridium satellite network (satellite subscription required). OPTIONAL INREACH WEATHER Use inReach connectivity to get detailed weather updates on GPSMAP 66i or a compatible device paired with the Garmin Explore™ app. Request weather forecasts for your current location, waypoints or destinations on your route. ACTIVE WEATHER When paired with your compatible smartphone, you can get real-time forecast information and live weather radar, so you’re always aware of the surrounding conditions. Specifications: Display Size 1.5"W x 2.5"H (3.8 x 6.3 cm); 3" diag (7.6 cm) Battery type rechargeable, internal lithium-ion Display resolution 240 x 400 pixels GPS Yes Dimension 2.5” x 6.4” x 1.4” (6.2 x 16.3 x 3.5 cm) Interface high speed micro USB and NMEA 0183 compatible Waterproof IPX7 Weight 8.1 oz (230 g) with batteries Display Type transflective color TFT Battery life up to 35 hours at 10-minute trackingUp to 200 hours at 30-minute tracking (power save mode) High-sensitivity receiver Yes Maps & Navigation External memory storage yes (32 GB max microSD™ card) Waypoints/favorites/locations 10000 Preloaded maps yes (TopoActive, routable) Basemap Yes Navigation Routes 250, 250 points per route; 50 points auto routing Navigation Track Log 20000 points, 250 saved gpx tracks, 300 saved fit activities Memory/History 16 GB (user space varies based on included mapping) Ability to add maps Yes Features Send route selection to MapShare during trip Yes BirdsEye yes (direct to device) Send waypoints to MapShare during trip Yes Active Weather Yes Contacts No Rinex logging Yes inReach remote widget No Pairs with Garmin Connect™ Mobile Yes Touchscreen No LED beacon flashlight Yes inReach remote compatible Yes Sun and moon information Yes Virtual keyboard for custom messaging Yes MapShare compatible with tracking Yes Geocaching-friendly yes (Geocache Live) Send and receive text messages to other inReach device Yes GLONASS No Send and receive text messages to SMS and email Yes Frequency band No Displays national, state and local parks, forests, and wilderness areas Yes Smart notifications on handheld Yes Connect IQ™ (downloadable watch faces, data fields, widgets and apps) Yes Custom maps compatible yes (500 custom map tiles) Compatible with Earthmate No Connections Wireless Connectivity yes (Wi-Fi®, BLUETOOTH®, ANT+®) LiveTrack Yes Exchange locations with other inReach device Yes Vibration alert No Map segments 15000 Point-to-point navigation Yes Picture viewer Yes Barometric altimeter Yes Weather Yes XERO™ Locations Yes Interactive SOS Yes VOX (voice activation) No Automatic routing (turn by turn routing on roads) for outdoor activities Yes GPS compass (while moving) Yes Includes detailed hydrographic features (coastlines, lake/river shorelines, wetlands and perennial and seasonal streams) Yes Includes searchable points of interests (parks, campgrounds, scenic lookouts and picnic sites) Yes Hunt/fish calendar Yes Compass Yes (tilt-compensated 3-axis) Compatible with Garmin Explore™ app Yes Tracks 250 Galileo Yes Garmin Explore website compatible Yes Area calculation Yes MIL-STD-810 yes (thermal, shock, water) Location reporting (send and receive GPS positions) No VIRB® Remote Yes