The device works according to Garmin's technical support project but I have to tell you, DO NOT expect to use it if you explore something new trail. system and expect it to give you turn-by-turn directions/guidance on your planned route. The screen jumps and spins while driving and it just can't keep up. It will redirect you and you will end up picking up your phone. The device tracks your actions well, but it's not fast enough, not clear enough, not precise enough to tell you where to go. . I used Garmin courses and Trailforks routes. and tried different ways to get one card per unit. It's useless and any review that tells you otherwise is probably using it on a trail system that's spaced. In the north-east it is generally badly oriented. Also, the map is too small and the colors/maps are very difficult to understand while driving. You will use your phone.
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