The first timer, in which all functions in the first test worked! I am therefore delighted with this wireless remote shutter release, since it was the whopping fourth timer, I've tried. The instructions are very easy to understand and concise, the timer can be entrained with its dimensions in every small pocket, the display, quite contrary to my expectations, is illuminated. For this, the "cheap" price, if one can speak of cheap at the current timers at all. Recommended.