The Nue Precision 3 Tattoo Machine represents the pinnacle of wireless tattoo technology, offering unparalleled performance and convenience. This state of the art machine empowers tattoo artists to create stunning artwork without the constraints of cords or frequent recharging. (1 year warranty) SOLD WITH BATTERY Technical Specifications:Voltage Range: 5V to 9VPower Input: 100–240V, 0.5A maxOutput: 5V / 1000mAMax Speed: 10,000 RPMStroke Length: 2.7mmSize: 110mm × 22–23mmWeight: 90gCharge Port: Dual-type Operation:Operating Temperature: 10°C to 35°CRelative Humidity: 30% to 75%Air Pressure: 900 to 1060 hPaIndoor use only on a flat, stable surface Strokes:Scars: 2.0 mmStretch Marks: 2.5 mmHair/Scalp: 2.2 mmFine Lines: 1.8 mmAdjust using the ring on the hand piece. Always test on practice skin first. Avoid over-tightening to protect the internal motor. Connection and Setup:1. Choose between the universal or precision needle holder depending on cartridge type. 2. Use the dual mode power cord to connect the hand piece to the power source. Ensure secure insertion. 3. With the hand piece facing up, screw in the needle cartridge until securely locked. Always confirm the cartridge is firmly in place. 4. Switch on the power unit only after all components are securely connected.