SDS original technology gives birth to an advanced product with dual functions- welding and power generating, bringing an economical product to the consumer. ** The welding arc is extremely smooth to get perfect welding quality in all kinds of applications. Also its welding current regulation is wide enough to suit most types of welding application. ** An AVR (Automatic Voltage Regulator) gives perfect power delivery with extremely low voltage fluctuation and minimum waveform distortion. ** Most models allow 12V DC output which is useful for charging car or boat batteries. ** Light weight and compact structure enhances on-site maneuverability and saves storage space.