Utopian Lissom Rotary Tattoo Machine (Made In USA) 3.5 MM Stroke, suitable for lining, shading, and color packing Diameter: Length: 78.7 mm x 53.4 mm 5.5 mm DC/Jack Plug, Precision DC Motor A Great Stable, Powerful, Vibration-free Machine designed for the long working hours Aircraft Aluminium Connection: 5.5 mm DC/Jack Plug Propulsion: Precision DC Motor Power Input: 15 V Switch Frequency: 55-165 Hz Rpm Range Stitches / Sec: 8V-8000rpm / min 8-800 / sec Running Volt: 6v Working volt: 7-12v Max Volt: 15v Warranty: 1 Year