1UNIVERSAL: input voltage, universal worldwide, and compatible with all tattoo coil machines and rotary tattoo machines, providing more power. 20.1V ADJUSTABLE ACCURACY: High power tattoo power supply, voltage 018V adjustable, 0.1V voltage increments, tattoo liner and shader can be easily achieved. 3LED DISPLAY: Tattoo power supply comes with an LED display, can be used at any time for the tattoo artist to observe the voltage, and then adjust, convenient and practical. 4ANTI FATIGUE MODE: Press the knob button to open the anti fatigue mode, the red indicator lights up, indicating the success of opening, step on the foot pedal can work for a long time. 5HIBERNATION FUNCTION: When the power supply stops working, the power supply will automatically enter hibernation state after 5 minutes, which can effectively save power.