Features： 1、Adjustable 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. 2、Fast 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. 3、Engraving: 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. 4、Faceplate: 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. 5、Rotation 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. Specification： Item Type: Tattoo power supply kit Material: Aluminum alloy, electronic components 1. Tattoo Pen Needle: Used for most tattoo cartridge needles on the market Interface: RCA interface Product Size: Long (without needle): Approx. 124mm / 4.9in Diameter: Approx. 29mm / 1.1in Needle Out Stroke: Approx. 0-3.5mm / 0-0.1in Needle Length: Approx. 1-4mm / 0.04-0.16in Speed: 8V 9000RPM/min (driving the working speed of the silicone cartridge needle, non idling speed) Start Voltage: 5V Working Voltage: 4-12V (with silicone cartridge needle) 2. Tattoo Power Interface: RCA interface Battery: Lithium battery 1300mAh(built in) Power Supply Size: Approx. 62 x 32 x 32mm / 2.4 x 1.3 x 1.3in Input: DC 5V 1A Output: 5-12V Output Voltage Adjustment Accuracy: 0.1V, long press for quick adjustment Charging Time: 2 hours (charging with a charger higher than 5V is strictly prohibited) Use Time: can be used for 3-5 hours Package List： 1 x Tattoo Pen 1 x Clip Cord 1 x Power Supply 1 x USB Charging Cable 1 x Manual