BlueSolar Victron MPPT Control with 3m (9') Cable

Is this 12/24 volt or just 12volt?

Building a solar/ battery monitoring system for rv. should i have this and a bmv 702, or does this replace the 702 functionality?

My roadtrek rv has 300 watts of solar with a tracer 4210rn charger. the charger has an rj45 port for a remote meter. is this remote meter compatible?

Is this a stand alone mppt controller -or- something to monitor other ones ( i.e. can this be used alone as a mppt by itself)?