Like a clock, they work out their main function at 100%. Never buggy, chrome is not erased. I was pleased with the effective backlighting of the display. Battery "long-playing", just super! Did not regret the money spent. In the previous comment, most likely the buyer got a fake. Pros below: Good, stylish design, chrome-plated metal case with chrome-plated metal buttons. Execution quality. Has cons: So I did not understand how the alarm is set on this watch and how to use the notebook. I didn't find a stopwatch either. The watch is difficult to select additional functions.