This Seven Star transformers has a 3000 Watt max capacity heavy duty voltage converter, step up and step down functionality, very high capacity shock-proof socket and a LED indicator for the power source. Switch the transformer to 110V for use in the USA to output 220V. Switch the transformer to 220V for use overseas to output 110V. The cord has a European plug, a US plug adapter is included, the sockets in the front accept North American 3-prong plugs and 2-prong European plugs. A ventilated design, durable industrial type cord, fuse protection, durable stainless steel chassis, and front power on indicator make this transformer heavy duty and great for continuous use.