Feature: 1. 2 IN 1 DESIGN: By connecting the provided RCA hook line, the pen can be switched to normal mode, allowing for both wireless and wired operation. This versatility caters to the diverse needs of tattoo artists, whether for lining or shading. 2. POWERFUL HOLLOW CUP MOTOR: The adjustable voltage range of 4‑12V allows for strong and consistent power output, enabling precise lining or shading. With a maximum speed of 10500 RPM at 12V, this pen delivers reliable performance and excellent color saturation. 3. 7 STROKES ADJUSTABLE: It emits a clear sound through the steel balls, providing precise adjustment of the needle stroke. With 7 adjustable needle stroke lengths ranging from 2.4mm to 4.2mm, tattoo artists can achieve accurate needle depth without any changes during the tattooing process. 4. WIRELESS RECHARGEABLE BATTERY: Equipped with double 2400mAh batteries and LCD screen, this pen displays real time tattoo voltage, remaining battery life, operation duration, and current frequency. 5. ALUMINUM ALLOY MATERIAL: Crafted with precise technology, this tattoo pen provides a comfortable and non slip hold. Its non slip groove ensures a secure grip, making it safe and easy to use. It is also compatible with 99% of tattoo cartridges available in the marke 6. SIMPLE OPERATION: With its precise wireless direct drive system, this kit eliminates the need for complicated accessories, such as external power supplies, foot pedals, and cartridge needles. 7. WITH EVA STORAGE BAG: It is perfect for organizing and protecting the tattoo pen from scratches or damage. It also facilitates easy transportation for tattoo artists when visiting clients. Specification: Item Type: Rotary Tattoo Pen Machine Kit Material: Aluminum Alloy, Electronic Components Machine Size With Wireless Power: Approx. 145 x 36mm / 5.7 x 1.4in Machine Size With RCA Adapter: Approx, 128 x 36mm / 5 x 1.4in Battery: Built In Lithium Battery 2400mAh (included) Process: CNC Integrated Engraving Needle Stroke: 2.4mm, 2.7mm, 3.0mm, 3.3mm, 3.6mm, 3.9mm, 4.2mm 7 gears stroke adjustable Motor: Approx. 18 x 27mm / 0.7 x 1.1in Vibration Value: 1.0m/S² Decibel: 36-39dB Motor Speed: 12V 10500RPM Battery Interface: Type C Interface (USB C) Charging Time: Fast Charging, No power state 2-3 hours can be full Usage Time: Sustainable Working 8-10 Hours Working Voltage Range: 4-12V Voltage Regulation Accuracy: Short press: 0.1V long press to quickly adjust the voltage LCD Display Content: Output voltage, battery capacity, operation duration, current frequency Structure: Integrated lithium battery pen structure, built in lithium battery, battery parts can be rotated and disassembled Needle: 99% of all cartridge needles on the market. Package List: 1 x Wireless Tattoo Pen1 x Replacement Battery1 x RCA Adapter1 x RCA Hook Line1 x USB Charging Cable 1 x Accessory Bag (Accessories Random Delivery)1 x Storage Box Note: