The 
The Miller Electric Millermatic Passport is a self-contained, portable, inverter-based MIG arc welding package that weighs just 56 pounds with an 8-inch spool of wire and an internal carbon-dioxide cylinder. In the shop, the Passport can be switched to external gas supplies. The unit's Auto-Line feature allows it to plug into any single-phase 115V or 230V power source, and its Multi-Voltage Plugs facilitate this process. Estimated list price: $1,811.
