Features : Welding materoal:low carbon steel、hard steel、medium carbon steel、low alloy steel. Limited condifions : please abide by the condition as follows for being used better. A、Surrounding temperature must be between-10℃ and 40℃;、B、Elevation height of the working place can t more than 1000m; C、The gad and powder may be come out in air of usual welding; D、 Allow to perform in air with salt to the coastline zone; E、power supply voltage is ± 10% of rated voltage; F、wind force is less than 1.5m/s at working place; G、it can t use in rain.