Feature:1. Adjustable Needle Stroke: Tattoo pen adopts a high speed strong magnetic torsion motor, with strong force and higher penetration, providing high frequency needle output speed, faster coloring, effectively reducing skin damage. Double steel ball buckle design, stably adjust the needle output.2. Ergonomic Design: Machine body is frosted, comfortable to hold, reducing the working fatigue of the tattoo artist. Suitable for most tattoo cartridge needles on the market, matched with RCA interface tattoo clip cord for wired and wireless operation.3. Tattoo Power Supply: 312V adjustable voltage, voltage adjustment accuracy is 0.1V, which meets the speed requirements of tattoo artists to operate different parts. Standard RCA interface, suitable for most RCA interface tattoo machines. Tattoo pen and wireless tattoo power supply are used together.4. Long Endurance: The power supply has a built in 1500mAh large capacity battery. When fully charged, it can continue to work for 7 hours under the 5V working voltage. LCD display is designed to display the current voltage and battery remaining capacity, convenient for tattoo artists to observe and operate.5. Complete Tattoo Set: Suitable for professional tattoo artists and tattoo beginners. Aluminum alloy tattoo pen body and tattoo power supply shell, firm and durable.Specification:Item Type: Rotary Tattoo Pen SetMaterial: Aluminum alloy, electronic componentsProduct introduction:1. Tattoo PenApplicable Needle: Used for most tattoo cartridge needles on the marketInterface: RCA interfaceTattoo Pen Size: Length (Without Needle): Approx. 86mm / 3.4in, Diameter: Approx. 32mm / 1.3inStroke: Approx. 3.5mm / 0.1inNeedle Discharge Length: Approx. 1-4mm / 0.04-0.16inWorking Voltage: 6-9V, do not overload work for a long timeVoltage Speed: 9000-12000RPM2. Tattoo Power SupplyProduct Size: Approx. 32 x 51mm / 1.3 x 2inBattery: Built in lithium battery 1500mAhOutput Voltage: 3-12V adjustable, adjustment accuracy 0.1VPower Supply Interface: RCA interfaceCharging Interface: USB Type CCharging Voltage: DC5V / 1ACharging Time: 2-3 HoursEndurance Time: When fully charged, it can continue to work for 7 hours under 5V working voltageCharacteristics: 6V strong start.Package List:1 x Tattoo Pen1 x RCA Interface1 x Wireless Tattoo Power Supply1 x USB Charging CableNote:Please allow slight error due to manual measurement. Thanks for your understanding.