Feature: 1. ADJUSTABLE VOLTAGE: The tattoo power supply has an adjustable voltage range of 3‑12V with a accuracy of 0.1V, meeting the speed requirements for tattooing different body areas. 2. LONG BATTERY LIFE: The built in 1500mAh battery provides up to 7 hours of continuous tattooing, While the LCD display shows the current voltage and remaining battery life for easy operation. 3. POWERFUL AND EFFICIENT: The tattoo pen features a high speed, strong magnetic motor, allowing for higher penetration and faster color saturation, minimizing skin damage. 4. ERGONOMIC DESIGN: The tattoo pen is ergonomically designed based on hand grip positions, with a matte finish for a comfortable grip, reducing fatigue during extended tattooing sessions. 5. ALUMINUM ALLOY: They are made of durable and lightweight aluminum alloy, providing a sturdy and comfortable grip for precise tattooing. 6. VERSATILE UASGE: Compatible with most cartridge needles in the market, the kit comes with an RCA connection tattoo grip, allowing for both wired and wireless operation. Specification: Item Type: Tattoo Pen Wireless Power Supply Kit Material: Aluminum Alloy, Electronic Components Description: 1. Tattoo Pen Needle: Used for most tattoos on the market a body needle Interface: RCA interface Tattoo Pen Size: Length (without needle) : Approx. 95mm / 3.7in Diameter: Approx. 32mm / 1.3in Length: Approx. 3.5mm / 0.1in Needle Length: 1-4mm / 0-0.2in Working Voltage: 6-9V, do not overload for a long time Voltage Speed: 9000-12000RPM 2. Tattoo Power Supply Size: Approx. 70 x 30mm / 2.8 x 1.2in Battery: Built in lithium battery 1500mAh Output Voltage: 3-12V adjustable, adjustment accuracy 0.1V Power Port: RCA port Charging Interface: USB Type C Charging Voltage: DC5V /1A Charging Time: 2-3 hours Endurance Time: under full charge, 5V working voltage can last for 7 hours. Package List: 1 x Tattoo Pen1 x RCA Cord1 x Wireless Tattoo Power Supply1 x USB Cable