Feature: 1. EXQUISITE CRAFTSMANSHIP: The shell of the tattoo pen is made of aluminum alloy, which has CNC exquisite craftsmanship, comfortable grip, you can get rid of the traditional way of tattooing. Wireless tattoo pen can let you enjoy creating. 2. LED DISPLAY: Tattoo pen with HD LCD display, can display the working hours, the current working voltage and available power, so that the tattoo artist can always observe the tattoo status. 3. 1800MAH: Cordless power built in 1800mAh high capacity lithium battery, which can fast charge 2 hours and can be fully charged. It can last for 5‑8 hours. 4. PRECISE VOLTAGE : 5‑12V precise voltage adjustment, the voltage adjustment accuracy is 0.1/0.5V, you can liner shader easily and adjuts the voltage precisely . 5. POWERFUL: The tattoo pen has a powerful built in motor with low noise and stable speed. With portable design, sensitive and lightweight, which allows the tattoo artist to operate with ease. Specification: Item Type: Tattoo pen Material: Aluminum alloy, electronic components Product Size: Length (without needle): Approx. 142mm / 5.6in Maximum Diameter: Approx. 33mm / 1.3in Charging Interface: USB interface Battery: Built in lithium battery 1800mAh Needle Stroke: Approx. 3.5mm / 0.1in Out of Needle Length: Approx. 0 ~ 4.5mm / 0 ~ 0.18in Production Process: CNC process Voltage: 5-12V Voltage Adjustment Accuracy: Short Press: 0.1V Long Press: 0.5V Product Display: HD LCD display (current voltage, remaining power, working hours) Needle: Most of the tattoo cartridge needles on the market Charging Time: Fast charging, about 2 hours without power state can be full Use Time: 5-8 hours. Package List: 1 x Wireless Tattoo Pen1 x USB Charging Cable Note: