The GS20 and GS20X drives take what has worked well in the GS2 series drives, added Sensorless Vector and Field Oriented Control as well as expanded on the built-in I/O, added a built-in PLC and offers the option for Ethernet communications. If that isn't enough the GS20X comes with a NEMA 4X enclosure so you can install it in a wash-down location. You are going to have a hard time believing that a drive this feature-rich costs as little as it does.
1/4 to 1 hp, 115 VAC (single-phase input)
1/4 to 3 hp, 230 VAC (single-phase input, 1/2to 3 hp in GS20X)