Esteem AC ARC welders are backed by the latest International technology to give you Optimum cost - effectiveness. Some special features :- • Welding Current Regulation by modern moving core magnetic shunt design • Stepless, smooth and infinitely variable current regulation • Adjustment of welding current possible even while welding is in progress; this enables fine current control • Adequate open circuit voltage for all general purpose AC and AC/DC electrodes • Compact in size and light in weight • Convenient and easily maneuverable from job to job .