What to look for in a noise gate?

So I'm a bassist and I bi-amp, one clean bass amp, and a fully gained up guitar amp for dirt.

Naturally the feedback is terrible and constant. I've been looking into getting a noise gate pedal bit I don't know what to look for. There's so many and seemingly they all do the same job.

I've been looking at the Behringer noise reducer because it's so cheap.

Any advice would be hugely appreciated :)