It's more like a wrist band than a ring, but yes.

[He's not sure about being called a wanderer. It sounds a little too much like a renegade, like the Doctor.]

I travel in space as well as time. Time travel on my home planet itself is strictly forbidden. It could cause all kinds of paradoxes and temporal disasters. I wouldn't say I wander, however. I go on missions, and then I return home.