Professional Cartridge Tattoo Pen Kit with US Plug Key benefits Complete, ready to use kit that includes a tattoo pen, digital power supply with US plug, foot pedal, and RCA clip cord. Compatible with cartridge needles for quick setup and needle changes. Precise and adjustable performance: power supply offers a clear voltage display with 1.5 to 18.0 V range and 0.1 V adjustment accuracy. Two memory presets for liner and two for shader make frequent settings easy to recall. Comfortable and controllable pen: alloy body with a non slip grip and a built in performance motor. The handle can be rotated to adjust needle protrusion for accurate lining and shading. Reliable connections: standard RCA interface compatible with all RCA tattoo clip cables. Firm jack connection reduces the chance of loosening during sessions. Suitable for learning and studio use: designed for beginners practicing technique as well as small studio applications that require a compact, portable setup. Features Tattoo pen material: alloy body with ABS, silicone, and copper components for durability and grip. Pen length: approximately 11.8 cm. Power supply input voltage: 90 to 265 V, US plug type included. Adjustable output voltage: 1.5 to 18 V, display readout, 0.1 V adjustment steps. Memory: 2 liner memory voltages and 2 shader memory voltages. Needle compatibility: for cartridge needle systems only. Interface: standard RCA connector compatible with RCA clip cords. Color: black purple. How it solves common problems Fast cartridge swaps reduce downtime and keep workflow efficient during practice or client work