4 US time zone selectable
Customer Reviews:
Good outdoor clock throughout the year 
I’ve had this clock for about a year. It worked fine throughout the winter even in -10F temperatures. In the summer, it catches some late afternoon sun, but this doesn’t seem to have harmed it. The original alkaline batteries are still working.
not an outdoor clock 
This model is appanently the same as the cheaper WT-3181P. The instructions say it can only be used outdoors if protected from rain and above 41 degrees. Its 27 outside right now. I guess it might be O.K. in southern Arizona. Amazon needs to add this important note to its product description.