This is already the 3.NavRun 500 I have gained me .... lack of water resistance in admittedly frequent use in the rain, in the shower has the two predecessors after 1 year of the Gar-out gemacht.Mit of functionality, ease of use and the comfort I have been in previous models very satisfied .... the clock is easy and quite suitable for everyday use, the display .... are easy to read and can be individually configured via the included software in 3 manually adjustable display pages to a wide range of parameters available .... of the time, training time, and max.Pace average pace until the calories burned, distance, laps or vertical meters missing little here. Via USB cable and the included software, the data can be sent to the home computer and manage it through Google Earth ... my third NavRun 500 shows in comparison to its predecessors .... greatly improved the manufacturer has tried the fisselige To optimize charging cable with guides and returned for safety even with a brush to clean the contacts .... optimally, this solution is still not .... a custom cradle for clicking of the clock would help ... all the work you did at degegen made new battery .... while was after 8 hours with GPS conclusion with the predecessors, so keeps the battery all the 16 (also reviewed) hours .... also finding satellite signals is now significantly quicker .... ever Weather permitting, the clock between 10sec and about 2 min logged into the system ..... Conclusion: The clock is suitable for ambitious amateur sportsmen and impresses with robust practicality, freely configurable displays and a wealth of additional features .... such a fast GPS system, a battery with 16 hours of GPS capacity and faster charge you look in this price range otherwise probably in vain .... thumbs up ..