Model Number: ADVAN ARC 250D Brand Name: FONDOF. Key Specifications/Special Features: Features:Adopts inverter technology and high-frequency arc start designCan balance automatic when voltage is waving with high-resistant electrical waveWith high-efficiency, small unload loss and saves over 40% energy than the traditional welderCan be easily arc, small flash, low-noise stable welding arc and wonderful welding shapeBeing able to continue running stably without a break and capable of every kind of acid or alkaline jointing with welding rod