In fact we use a Garmin 645 and kompre el 945 that gives me a rompió that comes from the top of the correa of the 645 but also used on the slopes and at the end of winter el 645 no me pasaba esto.Ayer probé usarlo solo caminando I have a problem dio el mismo, que podrá ser este a problem. GPS is installed in configuration with GPS GLONAS, in model 645 GPS solo.