1Voltage: The tattoo power supply host has an LED display that displays the current voltage in real time. The adjustable voltage is 3-12V, the adjustment accuracy is 0.1V, and the voltage can be adjusted by rotating the adjustment button. 2Universal: Tattoo battery has input voltage, universal in the world, and compatible with all tattoo coil machines and rotary tattoo machines, providing stronger power. 3Material: The shell of our tattoo power supply is made of ABS, which is light in weight, anti static, convenient and safe to use, durable, and has a long service life and can be used for a long time. 4Mode: There are 2 pedal modes, one requires pedal control, and the other requires no pedal control. Short press the voltage adjustment button, and the machine can continue to run. 5Design: The movement of our tattoo power supply set is strong and does not heat up for a long time. At the same time, its blue LED is fashionable and individual, creating a new element of tattoo style.