Stealth Tilt Pen BlackMachine Type Tattoo Pen for lining & shading. Color Black Machine Type Wireless Pen Brand Stealth (Pen Series). Voltage Adjustment To adjust the voltage just push the power button and tilt fthe machine from a 0 to 90 degree angle to get the follow voltage presets: 4. 2, 6, 7. 2, 8. 2,9,10,11 volts. Watch out demo video on how the machine works and can easily be adjusted. Needle Swing 3. 5mm swing Needle Protrusion 1. 5 to 5mm adjustable. With a simple