Features1Adjustable Voltage: Tattoo power supply's voltage is 5?12V adjustable voltage whose accuracy of 0.1V is equipped with digital display, which display the current voltage and remaining power, and easy to observe and operate. 2Fast Coloring: The voltage output of the tattoo pen is stable, the skin damage is low, and the coloring is fast, which can ensure that the liner and shader can be done easily , and the working time is long without heating. 3Engraving: The overall craftsmanship of the tattoo pen is CNC one piece engraving, the frame shell and accessories are all carved, and the fit between the accessories is very high, ensuring that the machine can be quiet during use. 4Faceplate: The built in faceplate of the tattoo pen adopts a 10 slot plum blossom eccentric disk, which is more wear resistant than ordinary faceplates, not easily deformed after a long time of use, and has a high rebound frequency. 5Rotation Scale: There are rotary scale marks on the body of the tattoo pen, and it is more intuitive and accurate to adjust the needle. The handshake part adopts a streamlined hand pattern anti skid design.SpecificationItem Type: Tattoo power supply kitMaterial: Aluminum alloy, electronic components1. Tattoo PenNeedle: Used for most tattoo cartridge needles on the marketInterface: RCA interfaceProduct Size: Long (without needle): Approx. 124mm / 4.9inDiameter: Approx. 29mm / 1.1inNeedle Out Stroke: Approx. 0-3.5mm / 0-0.1inNeedle Length: Approx. 1-4mm / 0.04-0.16inSpeed: 8V 9000RPM/min (driving the working speed of the silicone cartridge needle, non idling speed)Start Voltage: 5VWorking Voltage: 4-12V (with silicone cartridge needle)2. Tattoo PowerInterface: RCA interfaceBattery: Lithium battery 1300mAh(built in)Power Supply Size: Approx. 62 x 32 x 32mm / 2.4 x 1.3 x 1.3inInput: DC 5V 1AOutput: 5-12VOutput Voltage Adjustment Accuracy: 0.1V, long press for quick adjustmentCharging Time: 2 hours (charging with a charger higher than 5V is strictly prohibited)Use Time: can be used for 3-5 hoursPackage List1 x Tattoo Pen 1 x Clip Cord 1 x Power Supply 1 x USB Charging Cable 1 x Manual