1、NEEDLE LENGTH ADJUSTMENT: With dual stainless steel balls, the machine provides greater precision of 2‑4mm without changes during use, ensuring you can adjust the needle length with ease. 2、LOW VIBRATION NOISE: Made of aluminum alloy and steel, which operates at low vibration and produces noise of just 35‑40db, providing a quiet and comfortable experience for both the artist and client. 3、3.5MM STROKE: Eccentric wheel stroke 3.5mm, Precise direct drive system, no tattoo power, foot pedal and tattoo clip cord. Avoid the conventional cumbersome accessories and space constraints 4、POWERFUL: With 5‑9V voltage adjustment, the powerful 2.0A output motor easily delivers up to 9000r/m at 12V for easy liner and shader, producing long lasting and vibrant colors. 5、LONG LASTING: Built in 900mAh battery, 1‑1.5 hours can be quickly fully charged, 6V working voltage can continue to work for 3.5 hours, intermittent use can be used for about 5 hours. 6、CLEAR DISPLAY: The LED display accurately shows the current tattoo voltage and battery level, allowing tattoo artists to easily monitor the status of the machine. Item Type: Wireless Tattoo Pen Material: Aluminum alloy, electronic components With Wireless Power Machine Size: Approx. 140 x 23mm / 5.5 x 0.9in With RCA Conversion Head Machine Size: Approx. 96 x 23mm / 3.8 x 0.9in Battery: Built in lithium battery 900mAh Process: CNC fine engraving Stroke: Approx. 0 ~ 3.5mm / 0 ~ 0.1in Stroke Needle Length: Approx. 2 ~ 4mm / 0.1 ~ 0.2in adjustable Motor: Coreless flat motor (Approx. 20 x 16mm / 0.8 x 0.6in, 12V 9000 rpm) Structure: All in one lithium battery pen structure, built in lithium battery, battery parts can be rotated and removed Battery Interface: Type c interface (USB C) Use Time: Battery output current of 2.0A, in the normal 6V voltage work, can continue to work for about 3.5 hours, voltage stability, intermittent use can be about 5 hours. Charging Time: Fast charging, 1-1.5 hours without electricity can be full Working Voltage Range: 5-9V Voltage Adjustment Accuracy: Short Press: ± 0.5V LED Display Content: Output voltage and battery capacity situation Needle: Universal 99% of the tattoo cartridge needles on the market 1 x Wireless Tattoo Pen 1 x RCA Conversion Head 1 x Accessories Kit (Accessories Shipped randomly) 1 x USB Charging Cable