To set the time on the four sides of the housing mounted buttons, but the manual is required. The analog and digital display as well as the Universal Time must be set separately from each other - that would perhaps be able to solve some practical - and the date display will only work in the American format (first month, then day). The battery is said to hold 10 years - if the plexiglass cover it is doing because ...?
Despite these observations, the clock gets my recommendation: it offers significantly more than eg a Swatch similarly priced and if they still hold out a couple of years, I am very satisfied!