Neon Light Gas Tube Transformer Primary 115 volts, Secondary 15,000 volts. H&K Appliance Company, Lima, Ohio. I purchased it from an estate of a NASA engineer. Working condition is unknown. I don’t know how to test it and wouldn’t want to with an output of 15,000 volts without the proper knowledge. So that said, it’s selling as is. It measures approximately 9x5x7 inches and weighs 25-1/2 pounds.