The controller has four working modes, single-point pulse, double-point pulse, continuous pulse, original argon arc weldingSingle point pulse: Each time the welding button is pressed, the controller outputs a pulseDouble-point pulse: Each time the welding button is pressed, the controller outputs two pulsesContinuous pulse: Press and hold the welding button, the controller will continue to output pulses until the button is releasedOriginal argon arc welding: Press and hold the welding button, the controller will continue to output the start signal until the button is releasedThis controller is an auxiliary welding controller for argon arc welding, which can help argon arc welding workers to easily complete the welding work and improve work efficiency. This controller can accurately output the welding control time and control the welding points, which can imitate cold welding and spot welding. The controller has simple wiring and convenient use, which is a good helper for the staff.color:As shownMaterial:Plastic + MetalPackage Contents:1 x Argon Arc Welding Retrofit Cold Welder Controller kitOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.