This welding controller adopts a digital display parameter group selection through the parameter group button digital tube display the corresponding parameter group serial number. Pulse width and pulse interval settable 4 output modes design you can choose according to your demands. Total 10 groups of welding parameters can be saved. Features: Digital display design: parameter group selection through the parameter group button digital tube display the corresponding parameter group serial number. Pulse width setting: the pulse width parameter is set by the pulse width button the parameter ranges are 0-999ms. Pulse interval setting: pulse interval setting by pulse interval button the parameter ranges are 0-999ms. Output mode: S..PULSE: Single pulse output; D..PULSE: Double pulse output; C..PULSE: Continuous pulse output; A..ARCA: Primary hydrogen arc welding output. 4 modes selectable: each press selects one output mode you can choose according to your demands. Parameter group: total 10 groups of welding parameters can be saved. Signal output: Controller signal output connected to hydrogen arc . Signal input: Controller signal input connected to the control button. Specifications: Name: Controller Material: plastics Item size: 178 * 50 * 21mm / 7.01 * 1.97 * 0.83in Package size: 180 * 100 * 25mm / 7.09 * 3.94 * 0.98in Package weight: 230g / 8.11ounce Packing List: 1 * Controller