If a power supply can take 100-240volt AC, then it should be a regulated switching supply.
Ok to use with an Uno...if you don't draw a lot from the 5volt or 3.3volt pins.
So only low power sensors and a few LEDs.
Feel the temp of the part between the DC jack and the USB jack.
If it sizzles, and you can see the shape of the part on your finger, then it's too hot.
Leo..