The Irons FK One Adjust Tattoo Machine is a next-generation, precisely built apparatus created for tattoo masters who seek adaptability, equilibrium, and immaculate operation. This enhanced rendition of the FK One redefines flexibility with a patented twist mechanism that lets artisans finely tune stroke length from 2.0 mm to 5.0 mm in 0.5 mm increments. Seamlessly modify your setup on the fly - ideal for mastering every tattooing method, from ultra-fine lines to bold shading and solid color applications. Every aspect of the FK Irons One Adjust is crafted to support professional effectiveness. The integrated digital touchscreen monitor supplies real-time voltage feedback and reacts even through gloves, maintaining your concentration on the work, not the configurations. The precision-built motor guarantees smooth, steady power supply, while the drop-in rechargeable power source offers up to 6 hours of wireless operation, enabling you to work unimpeded. Conceived with ease and durability in mind, its ergonomic pen-style frame lessens hand tiredness, and the anti-roll lid keeps the machine steady on your workspace. Fabricated from aircraft-grade aluminum and shaded in stealth black, the FK One Adjust merges resilience, novelty, and tasteful form - a professional apparatus built to execute session after session. Key Features Adjustable Stroke Range: 2.0 mm - 5.0 mm, modifiable in precise 0.5 mm steps Patented Twist Mechanism: Alter stroke length instantly without implements Digital Touchscreen Display: Real-time voltage tracking, glove-friendly operation Wireless Freedom: Detachable Panasonic NCR 18500A battery provides up to 6 hours runtime Dual Charging Dock: Keeps both power sources ready for nonstop work Power Output: 5 - 12 V, adjustable in 0.5 V steps Click-Grip Ratchet: Exact needle depth modification for total command Anti-Roll Cap: Keeps your machine steady on any surface Universal Cartridge Compatibility: Functions with all standard needle systems Construction: CNC-machined 6061 T6 aluminum for excellent balance and lastingness Manufactured in the USA Product Details Color: Stealth Black Stroke Range: 2.0 mm - 5.0 mm (adjustable) Power Supply: Wireless / Removable Battery System Voltage Range: 5 - 12 V, 0.5 V steps Battery Life: Up to 6 hours Motor: High-precision DC motor Body Material: 6061 T6 aluminum Included: x2 Panasonic NCR 18500A batteries, dual charging dock, anti-roll cap Manufacturing: Engineered and made in the USA FK One Adjust - Stealth A fully adjustable, wireless tattoo machine built for artisans who value accuracy, command, and creative liberty - providing unparalleled performance for every tattoo master.