Boss FV-500L or FV-500H?

please forgive me for rather a basic question, I’d like to get a sturdy volume pedal for use with my BB. I often use the stereo output of the BB, with stereo digital piano on the BB input (although sometimes in different location I will have piano and BB separated to PA)

I’m a bit confused by the low impedence versus high impedance description of the Boss pedals, but only the 500L is a stereo volume pedal. Will this be ok with the BB?

Thanks :slight_smile: