I have never seen it labeled that way before. I have always seen Bottom Round roast. I use it to make beef jerkey sometimes. I usually buy the leanest cut that I find on sale. Half the time it's the bottom round. It has so little marbling that most people over cook it, hate it, and don't buy it again.
I have smoked it in the past. I would recomend you smoke it for 2ish hours. Then place it in a foil pan and cover tightly with foil.Stick a probe in it and cook it to desired doneness. I like 125-130 degrees. It will still be pretty pink but sliced thin it's makes a fabulous sandwich. Of course it all depends how big the thing is. If it's a small roast 2-3 pounds, it will probably be done it 2 hours.