less than one year and the gp do not work at all ! . I have a gp 60 CSX that have be serve I for year . I buy this one expect the same reliability , plus the map capability . the unit have freeze for ever , it be not able to finish the load cycle and there be no way to solve it . since I live out the US get service be cumbersone and such a poor quality be not acceptable on equiptment so critical .