1. Adjustable Voltage: Tattoo power supply 4.2& 8209;12V adjustable voltage, adjustable voltage accuracy of 0.1V, equipped with an LCD display, showing the current voltage and remaining power, easy to observe and operate.     2. Dual Mode Control Switch: Convenient dual mode control switch, you can not only use the power supply on the switch button control, you can also use the Type C button controller (manual switch controller similar to the foot pedal function), you can always control the power switch at work, just connect the control line to the power Type C port can be controlled, convenient for tattoo artists to operate.     3. Long Lasting: Built in 1500mAh high capacity battery, fully charged state, you can work continuously for 4& 8209;5 hours, lightweight and compact, so that the power supply and your tattoo pen into one, get rid of the traditional power supply to use multiple accessories to work, omitting the power cord, hook line, foot pedal, so that the tattoo artist work more convenient.     4. High Frequency Stroke: The motor internal premium copper wire winding, provide high frequency stroke speed, good heat dissipation; the machine can rotate the pen head to adjust the length of the needle, universal 99% of the tattoo catridge needles on the market.     5. Powerful: Aluminum alloy tattoo pen, strong and durable, light weight, the body shaking small, can operate for a long time. Machine built in powerful motor, running fast, strong force, can penetrate deep into the skin, creating precise lines and shader.         Specification: Item Type: Tattoo Pen Machine     Material: Aluminum alloy, electronic components     Product Description:     1. Tattoo pen     Interface: DC interface     Size: Approx. 121 x 30mm / 4.8 x 1.2in     Recommended working voltage: 6-9V     Working voltage: 6-8V shader, 7-9V liner     Needle: tattoo catridge needles     Stroke: Approx. 3mm / 0.1in     Speed: 6800-9000rpm     Current: 1A     2. Tattoo power supply     Interface: DC interface     Battery: Built in lithium battery 1500mAh     Power supply size:  Approx. 7.3 x 3.2 x 3.2cm / 2.9 x 1.3 x 1.3in     Input: 5V±0.25V/1500mA(Maximum)     Output: 4.2-12V/6W(Maximum)     Output voltage adjustment accuracy: 0.1V, long press for fast adjustment     Charging time: 1.5-2 hours (charging with a charger higher than 5V is strictly prohibited)     Use time: Available for 4-5 hours              Package List:     1 x Tattoo Pen Machine   1 x Tattoo Clip Cord    1 x Tattoo Power Supply     1 x USB Charging Cable     1 x Power Control Switch Cable