Got the clock mainly for time stop buy jogging etc.. Everything worked flawlessly. When I got it taken with the indoor pool, it took less than 20 seconds, and the clock was full of water and thus now broken (though I'm not deeply immersed or the like, the water penetrated ever on the water surface. So please do not be fooled it leave that is on the clock in three places "Water Resist" and on the back of a clock symbolically a swimmer is displayed. As the clock "in the dry" works very well and because of the price gets the clock anyway 3 stars from me.