Got this for my Legally Blind mother-in-law.  With her very advanced Retinitis Pigmentosa, (tunnel vision), she was able to read the hands on the watch.  The voice comes through loud enough to be heard and clear.  She is hard of hearing too and was able to hear the time.  There is an alarm with a variety of sounds that can be chosen.  The watch is completely usable as a voice-only device so a blind person could use it without trouble.

The digital watch with the voice is used by way of the four corner buttons. The the hands are set with the dial on the right.  These two interfaces do not talk to each other so both must be set independently.