Enjoy efficient, peak-level tattooing with the Mast Halo Tattoo Power Supply Output voltage: 1.5v–12v; 0.1v voltage adjustment increments The Mast Halo is built to last, meet your demands, and make your job easier Enjoy 360 degree rotational abilities on the OLED white display screen; this means you can adjust the orientation and route your cables any which way based on your workstation and personal setup