I ordered the clock because I stumbled on the price and also the idea of the time display was funny. A bit minimal mental arithmetic should dominate already :-). Set it was after a quick look very quickly in the small enclosed instructions. And so far it is working properly. It shows the time, however, "only" in 12-hour mode and then with a "PM" on. Anyone who has a 24-hour display will be disappointed. For me, this is completely irrelevant and I for one find the clock super - at the price of less than 20! The bracelet is made of plastic, which, however, not cheap looks and will also keep well. Let's see how long by holding the supplied battery.