220 3 phase. I run it on a converter. I will sell you my spare converter for an additional 400.00 its a rotary phase converter. this linebore is a great machine its super fast and easily adjustable. you can switch between one or two rows. both at the same time or front or back only. I've hung on to this for quite a few year because they are hard to come by. I use my cnc for all boring now. Just can't justify the space to store it. see one in action here- https://youtu.be/teShGER2g_o?si=vL6kfiBq14ktnSCx