I have worn such a clock ca 10 Jaren, and then bought with some risk for swimming. Swim about 10 Jaren no problems with regular and sauna (!!!): Conclusion. The clock is easy. Only armband I had to change several times. Buy again, because in the old (which goes), the knobs have become sluggish and the lamp too weak. So if you need the clock for life, and not for show off, will be well served with this clock: light, robust, thin, and goes and goes and goes. Nix superfluous, everything for daily use ... It lacks IMHO timer, but for the price (and also 10 times more expensive) there is not comparable ratio price-quality. Simply TOP !!