This clock is used exclusively by me for timing and doing their service in the bathroom. This works very well and the time is displayed reliably. After inserting the battery, it takes a moment until the time is set. Once this is done, the time is displayed accurately. Once, however, the clock, the time shortly displayed incorrectly. However, this was corrected within a few minutes. What was the background of this false indication, has not opened up to me. So far, this clock does but very reliable service. I would therefore always order again.