This clock is in fact certified with a test pressure of 10 ATM and thus in principle suitable for swimming - at the lower test pressure of many other watches it remains a risk. However, I want to keep on swimming the clock. The pulse measurement can not function in the water course. The clock looks nice, but that's a matter of taste. Personally, I would hope, the clock would have a mineral glass, but only seems to be plastic and is easily scratched. Why Timex has chosen this special dock on bracelet below the clock of the clock the viewer something close, her secret remains. The bracelet itself has a pin buckle and the protruding end is held by a locked loop. A handy little thing. The pulse measurement has now works, a test in sports is still pending. The PC connection worked. (Perhaps as a tip: not designated Care must be taken to install the Wireless USB driver The USB stick can be plugged in to install..) Since the data transfer is bi-directional, the clock can be comfortably furnished, including second-exact timing! This is a real advantage; for though you content can not complain about the manual - it is very extensive and well written, but as "prose" written where small graphics would have led quickly to the goal. I can at least make any assessment of the current function training plan. After 24 hours, two swimming - a strong buy recommendation!