1,DUAL BALL BEARING: Its design allows for precise adjustments and provides a comfortable grip. It is suitable for various tattooing techniques such as lining, shading, and filling, making it a versatile tool for creating beautiful artwork. 2,HIGH PERFORMANCE MOTOR: Its design delivers robust power. At 8V voltage, the pen reaches an impressive rotation speed of approximately 8600 RPM, providing artists with the necessary force to execute their tattoo designs. 3,DIGITAL DISPLAY SCREEN: Equipped with a built in battery, this tattoo pen offers approximately 6‑10 hours of usage at voltages below 8V. Say goodbye to the need for connecting power supplies and dealing with voltage fluctuations as the built in battery and the digital display screen allow for real time voltage adjustment. 4,RCA INTERFACE: In the event of the built in battery running out of power, you have the flexibility to switch to RCA connectivity, allowing you to connect the tattoo pen with a power supply and operate it in the traditional manner. 5,NEEDLE DEPTH ADJUSTMENT: The needle tip and the pen body remain fixed, allowing you to effortlessly rotate the outer casing of the pen to visualize and adjust the desired needle length. 6,VERSATILE POWER OPTIONS: It boasts outstanding craftsmanship and can be used both wireless with its built in power source or with a cord through the RCA interface. This versatile feature allows artists to work without the hassle of cables. Item Type: Wireless Tattoo Pen Material: Aluminum Tattoo Pen Size: With Built in Battery Head: Approx. 13.5 x 3.2cm or 5.3 x 1.3in With RCA Head: Approx. 9.5 x 3.2cm or 3.7 x 1.3in (both heads can be detached and replaced) Tattoo Pen Function: Suitable for cutting lines and shading Built in Battery Head Type: Lithium ion battery, 2000mAh Charging Interface: Type C Built in Battery Head Function: No need for additional power supply, can be used when fully charged, voltage adjustment 5-12V 1 x Wireless Tattoo Pen 1 x Clip Cord 1 x Charging Cable 2 x Rubber Rings 1 x RCA Interface Replacement Head 1 x Storage Case Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.