best induction burner for cast iron cooking?

I have been using a cast iron skillet more lately and want to get a portable induction burner for when I don’t feel like using the regular stove. Ive never owned an induction burner before, so im not really sure what actually matters when choosing one. whats the best induction burner you’ve used with cast iron?

mostly just looking for something that heats evenly and doesn’t constantly shut itself off. thaaaanks for any recos.