Incorporating mast s new design concept to create a simple, easy-to-use, and efficient tattoo power supply mast circle.It is compatible with traditional coil and rotary tattoo machines.Easy to use: the mast circle can work with or without a foot pedal. Press the round panel to control start and stop, when there is no foot pedal.Turn the round panel to adjust the voltage.Type-c port: more stable voltage when working with the type-c power supply port. It also has wider adaptability so you can use your existing type-c charging device without worrying about finding the charging cable.Anti-tired & non-anti-tired: there are two modes of this power. When inserting the foot pedal,press the circular panel once and b1 is displayed, indicating that the anti-tired mode is enabled press the circular panel again, and b2 will be displayed, indicating the non-anti-tired mode.What s the difference between these two modes anti-tired mode: the pedal will keep working with power when it is pressed once, and stop working with power when it is pressed again non-anti-tired mode: the pedal must be stepped on all the time to work. And the power supply will stop working when the pedal is released.Specifications:output voltage: 4-15vpower weight: 157gsize: 82mm* 82mm*34mm