I have one that I used for work. It does not need any salt, just water. Now that I'm retired it's packed away and I can't recall the brand...sorry.
They are great to use on larger fabric pieces that can be hung up and gone over quickly with the wand. Mine produced steam continuously, so the room sometimes got pretty muggy. It's bulky and cumbersome, even though it has wheels. It can also be dangerous if someone walks in front of the steaming wand while it's on. The travel steamer sounds like a more practical idea.
~ C