The machine is equipped with a brushless motor: Longer life than coreless motors, low voltage can also be used, more powerful. The machine supports long-term operation and runs smoothly. The design of the machine is very small and comfortable to use for a long time. The stroke of the machine is 3.5mm, which is suitable for multiple styles, especially suitable for lining. Sea Brushless tattoo machine can meet a variety of needs. Adjustable needles length from 0mm up to 4mm. Specifications: Weight: 148g Diameter: 33mm Length: 92mm Stroke: 3.5mm Working Voltage: 5-12V Speed: 12V/9000RPM