【Enhanced cleaning performance】The copper construction resists oxidation, improving cleaning effectiveness. The power tube increases cleaning agent retention, boosting efficiency and durability. 【Intelligent voltage adjustment】Automatically compensates for voltage instability with frequency adjustment (0-34Hz), instantly increasing voltage to clean yellow spots, black spots, and solder joints of varying degrees. 【Effortless operation】Simply scrub back and forth on welds a few times to remove oxidation black spots. Flexible design reaches small gaps and hard-to-access areas, eliminating manual polishing. 【Short circuit protection】Features intelligent short circuit protection to safeguard the motherboard, enhancing safety and reliability even in error conditions. 【Versatile applications】Suitable for welding metal, arc welding, and cleaning industrial residues. Ideal for metal components in cars, airplanes, ships