I have a question;the below quote is from the MM212 info on the Miller site.

Seven taps provide wider welding range of 30-210 amps with improved high and low ends to weld materials from 22 gauge up to 3/8 in (9.5 mm) thick in a single pass.

Why is this control that selects the 30-210 AMP range labled VOLTAGE? This does not make sense to me, can someone explain this.