Features1ADJUSTABLE 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. 2LONG 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. 3POWERFUL AND EFFICIENT: The tattoo pen features a high speed, strong magnetic motor, allowing for higher penetration and faster color saturation, minimizing skin damage. 4ERGONOMIC 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. 5ALUMINUM ALLOY: They are made of durable and lightweight aluminum alloy, providing a sturdy and comfortable grip for precise tattooing. 6VERSATILE 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.SpecificationItem Type: Tattoo Pen Wireless Power Supply KitMaterial: Aluminum Alloy, Electronic ComponentsDescription:1. Tattoo PenNeedle: Used for most tattoos on the market a body needleInterface: RCA interfaceTattoo Pen Size: Length (without needle) : Approx. 95mm / 3.7inDiameter: Approx. 32mm / 1.3inLength: Approx. 3.5mm / 0.1inNeedle Length: 1-4mm / 0-0.2inWorking Voltage: 6-9V, do not overload for a long timeVoltage Speed: 9000-12000RPM2. Tattoo Power SupplySize: Approx. 70 x 30mm / 2.8 x 1.2inBattery: Built in lithium battery 1500mAhOutput Voltage: 3-12V adjustable, adjustment accuracy 0.1VPower Port: RCA portCharging Interface: USB Type CCharging Voltage: DC5V /1ACharging Time: 2-3 hoursEndurance Time: under full charge, 5V working voltage can last for 7 hoursPackage List1 x Tattoo Pen 1 x RCA Cord 1 x Wireless Tattoo Power Supply 1 x USB Cable