HITBOX 5 in 1 Intelligent Aluminum MIG Welder is a Economical Welding Machine for Beginners and Professionals: One-key smart setting. One key to select welding method. Inch and centimeter units can be switched at will. Each button has its own unique adjustment function. SYN MIG-Intelligent setting of each step of the welding process makes adjustment simple. HITBOX is devoted to providing quality welding solutions to those who are engaged in the welding industry, Home DIY,or passionate about metal crafting. Each product has been authoritatively tested before leaving the factory. 2-year warranty and lifetime technical support save you worries