MinderRC DH30 Adjustable Spot Welder with 30 Speeds and OLED Screen, 5000mAh Battery for Max 0.2mm Nickel Strip Spot Welding, Portable. Please charge fully before use! Ensure spot welding pins do not touch each other to prevent short circuits and damage to the machine. Introducing the DD3.0, a mini spot welder capable of welding nickel strips from 0.1 to 0.15mm across 30 positions (MAX). It features a 0.91-inch screen for easy viewing of battery level and other settings, making it highly practical. Adjusting Spot Welding: Start at a low setting and gradually increase until successful welding is achieved. Avoid excessive power to prevent MOS tube failure. Dark solder joints indicate a high battery charge. When welding, apply light pressure to the solder joint, connecting the nickel strip and battery. Excessive pressure weakens the weld. Welding is automatically triggered after one second of pressure. Adapter Requirements: Requires a 5V, 2A or higher adapter. If you don't have one, we recommend purchasing one from our store for optimal charging. USB Output Port Description: Due to internal circuit differences, there may be compatibility issues when charging phones. Phones cannot be charged temporarily. To use the USB output port as a charger, short-circuit pins 2 and 3. Compatibility with Android laptops may vary due to different charging protocols; not all support 2.4A. Charging Port: Type-C Product Size: 103x83x29mm Color: Gray Material: Metal Package Contents: 1 x Spot Welder 1 x Stub Welder 1 x Cable 1 x Nickel Strip (Other products not included.) Note: Colors may vary slightly due to lighting and screen differences. Measurement tolerance is +/- 1-3 cm.