Rugged, Full-featured Handheld with GPS, GLONASS and Wireless Connectivity 2.6 sunlight-readable color screen High-sensitivity GPS and GLONASS receiver with quad helix antenna Preloaded TOPO Canada maps plus a 1-year BirdsEye Satellite Imagery subscription 3-axis compass with barometric altimeter Wireless connectivity via Bluetooth technology or ANT+ GPSMAP 64st features a 2.6 sunlight-readable color screen and a high-sensitivity GPS and GLONASS receiver with a quad helix antenna for superior reception. GPSMAP 64st includes a 3-axis electronic compass with barometric altimeter, wireless connectivity, and preloaded TOPO Canada maps plus a 1-year BirdsEye Satellite Imagery subscription. Explore the Terrain - GPSMAP 64st comes with a worldwide basemap with shaded relief and is preloaded with TOPO Canada. Plus it includes a 1-year BirdsEye Satellite Imagery subscription - all the tools for serious climbing or hiking. Map detail includes national, state and local parks and forests, along with terrain contours, elevation information, trails, rivers, lakes and points of interest. Get Your Bearings - GPSMAP 64st has a built-in 3-axis tilt-compensated electronic compass, which shows your heading even when you're standing still, without holding it level. Its barometric altimeter tracks changes in pressure to pinpoint your precise altitude, and you can even use it to plot barometric pressure over time, which can help you keep an eye on changing weather conditions. Share Wirelessly - Share your waypoints, tracks, routes and geocaches wirelessly with other compatible devices. Your friends can enjoy your favorite hike or cache without waiting for you to plug in to your computer - simply press send to transfer your information to another Garmin handheld. GPSMAP 64st also connects to compatible Garmin devices, including VIRB and accessory sensors, including tempe, foot pod and heart rate monitor. Stay Connected - With Smart Notification you can wirelessly receive email, texts and alerts from your compatible iPhone 4s or later. Stay connected without having to dig into your backpack for your smartphone. Keep Your Fix - With its quad helix antenna and high-sensitivity, GPS and GLONASS, receiver, GPSMAP 64st locates your position quickly and precisely and maintains its location even in heavy cover and deep canyons. The advantage is clear - whether you're in deep woods or just near tall buildings and trees, you can count on GPSMAP 64st to help you find your way when you need it the most. Add Maps - GPSMAP 64st comes with a built-in worldwide basemap with shaded relief, preloaded TOPO Canada and a 1-year subscription of BirdsEye Satellite Imagery for a photo-realistic view. Adding more maps is easy with our array of detailed topographic, marine and road maps. With 8 GB of onboard memory and microSD card slot, you can conveniently download TOPO 24K maps and hit the trail, plug in BlueChart g2 preloaded cards for a great day on the water or City Navigator NT map data for turn-by-turn routing on roads (see maps tab for compatibility). In addition, the 64st is compatible with Garmin Custom Maps, a map format that allows you to transform paper and electronic maps easily into downloadable maps for your device, for free.