One of the reviews seems to indicate you can’t rotate the display.
Other comments complain that it can’t set its own time.
It’s sad they don’t make them as nice as this one anymore (mine still works!):
In case you’re wondering, it does both. It syncs time via the signal from the US Navy nuclear timeclock (so it’s always exactly right) and the display can be rotated in 90 degree increments.
It also is a nice red that doesn’t hurt the eyes (red light won’t constrict your pupils) and is dim enough not to see the projection in the daytime and not to be noticeable unless you’re looking at it (intentionally) at night.