Portable, handy and energy-saving High sustain rate of duty cycle Continuous welding Balancing voltage-waving Over-voltage & over-current Protection Suitable for every sort of rod (acid & alkali), supporting cellulose rod. 1. Superb Energy Efficiency 2. Extremely easy to operate 3. Continuous welding ability 4. Automatic protective-function for over-voltage and over-current 5. Suitable for electrodes up to 3.15 mm