Digital Pen Plating StationPen plating system for gold, rhodium, silver, rose gold, palladium, black rhodium, nickel, onto any type of material such as steel, aluminum, nickel, copper, brass, platinum, gold, silver, palladium, white gold, etc! Impulse power makes it easy to plate difficult solutions such as black or blue rhodium. Stable voltage output Automatic dual voltage input (115V 220V) Quick connect disconnect System Includes: Professional plating pen Compact 4. 5"