I sought a watch for swimming. This is very satisfactory. I changed pool and precision is perfect. Previously, I was swimming in a pool with swimmers of different levels and rhythms were broken, my swims frequently changed depending on necessary acceleration and deceleration. I found a difference of 100 to 150 meters between the number of kilometers recorded and actual number. Nothing very important. However, since I'm training in a less crowded pool with regular swimming, the number of meters is correct. The timer function is also very satisfactory in saunas.