[Arran]

It may use a mains transformer on the inside, but there just isn't enough information to tell, it does appear to have a metal case which most switchers would not have, it also lists the input line frequency which many switchers do not care about. At $2.54, and free shipping, you could buy one and find out, just remember that it's Chinese and it's rated at 60 watts, so assume that it's good up to 45-50 watts without burning up. I have no need of such things, I have a bin full of power cubes/wall warts that are from the era before China junk electronics.
Regards
Arran