1FAST COLORING: Rotary tattoo pen allows for quicker and more efficient coloring, reducing ineffective punctures and minimizing skin damage. Suitable for a wide range of tattoo styles. 2RCA INTERFACE: Tattoo pen is equipped with an RCA interface, which is a widely used interface in the market. It offers strong compatibility and stable output. 3POWERFUL MOTOR: The built in powerful motor provides a strong power and reliable performance, ensuring smooth and precise tattooing. 4ADJUSTABLE NEEDLE LENGTH: The internal part of the handle features two rubber rings, allowing for precise adjustment of the needle length with a simple twist. 5ALLOY FRAME: The pen frame is made of alloy, giving it a solid and substantial feel. It provides a unique and comfortable grip for a better tattooing experience.