Features1BRUSHLESS MOTOR: Comes with low voltage, high speed, and high torsion, equipped with a frequency battery, which precisely adjusts the stroke frequency to bring out a superior experience. 2ECCENTRIC WHEEL STROKE: Equipped with 4mm eccentric wheel, made of aluminum alloy and copper, fully compatible with the motor, so that the machine is always in a low vibration state during operation. The sound emitted is about 8V-45dB. In addition, it is equipped with one 4.5mm and 5.0mm eccentric wheel each, which is easy to replace. 34.0MM STROKE ADJUSTABLE: Built in two adjustable steel ball, when you turn the handle will emit a crisp sound, and you can adjust the stroke more accurately, which will not change the needle stroke in the process of tattooing. 4ERGONOMIC DESIGN: Fine workmanship, attention to detail, and with anti slip texture for safe use. Lightweight design, long time use of the hand will not feel fatigue. 5HIGH HARDNESS: Tattoo pen machine suitable for most cartridge pins, made of reliable aluminum alloy, high hardness, not easy to rust and deformation.SpecificationItem Type: Tattoo Pen MachineMaterial: Aluminum alloy, electronic componentsSize: Approx. 87 x 37mm / 3.4 x 1.5inInterface: RCANeedle: Tattoo cartridge needleStroke: 4mm / 0.16inProcess: CNC engraving processPackage List1 x Tattoo Pen 1 x RCA Clip Cord 1 x Tattoo Pen Storage Bag 1 x Accessory Bag (Accessories will be shipped randomly)