1. Digital tube accurate display, encoder (not potentiometer) regulation is more accurate and stable, longer life 2. Single and double pulses are adjustable, spot welding counting, synchronous triggering, power-off saving 3. 41A thyristor version can control below 1000W, 100A thyristor version can control below 3000w 4. This control board adopts double-sided welding, integrated into a board with more reasonable component layout, in order to be easier to install on the machine casing. 5. foot pedal anti-shake function is added, one spot welding is completed once it collapses, preventing factors such as poor switch contact from causing -spot welding!<br><br>It must be powered by an AC former (AC 12V-17V power supply). It cannot be powered by a DC power supply! It's DIY kits, needs to finish by yourself. Color: Red Material: ABS<br><br>Package Contents: 1 x 100A Welder Controller Board<br><br>Only 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.