Endurance test in the field, at the wheel, especially when tracking part for later syncing with my photos. And a first: Everything worked wonderfully, the battery lasts forever and three days (actually, I forgot Last, turn off the Teaso per and 2 1/2 days later juice was still in the device), the operation is simple and self-slaps for therefore not quite as savvy techies simply usable, big thumbs up from me. Conclusion for Teasi Pro therefore can only be a positive. Optimal in terms of size, fits in any pocket, the display still is but still good and clearly recognizable, the battery lasts forever. The maps it is great and to date and the functions of Teasi Pro offer more than I understand to use. And I have not even draufgeladen own maps. Or I created on the computer routes and then migrated (or cycled). Namely everything goes with the Teasi Pro. And much much much much more. Great.