I bought the air compressor brand new from Harbor Freight exactly a month ago, had to get a compressor to use while my larger one was getting fixed. It runs on normal household electricity, 120v. 3HP motor, 21 gallon tank. It was $199 plus tax, I'm selling it for $150. All info can be found here: http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=47065