1. Operation without the main electricity
2. Extremely compact and portable
3. MMA welding for ARC 180
4. TIG welding with gas-valve torch for ARC 180
5. Battery indicator shows the state of charge of the battery
6. Built-in Hot start, arc force, and anti-stick
7. Variable amperage control with digital meter, for a simultaneous welding current display
8. Quick charge-Recharges battery to 80% within 35mins and fully charged in 60mins
9. Protection from overcharging, deep discharge, overheating, over-voltage and under-voltage
10. the power source can be used for welding while charging