Item Type: Spot Welding Machine Material: ABS+Metal Color: Red+Blue+Black Input Line Length: Approx.20cm/7.87in Length of Welding Pen: Approx.30cm/11.81in Battery: Lithium battery(not included) Quantity: 1 Set Weight: Approx. 207g / 7.3oz How to Use 1: Power connection The controller comes with a 20cm long 10AWG input wire. One end has been crimped with a U-shaped terminal, and the other end has not been processed. Connect the crimped U-shaped terminal to the control power input terminal, and the other end is processed according to its own power supply. Do not connect the negative electrode wrong. 2: Switch on and off There is a power switch under the control board. After pressing, wait for 3 seconds. After the buzzer drops, the LCD lights up and the boot is complete. Press the power switch again to shut down. 3: Screen description and parameter adjustment. 4: Welding Keep the welding pin clean. If the welding pin is polished into a round head, the welding effect can be improved. There are manual and automatic methods. Battery Selection: 1: 12V car battery from 25 to 40ah, requires good performance and low internal resistance 2: 4000 to 6000mAh 45C to 60C 3S model aircraft lithium battery 3: 30 to 35ah 12V capacity lithium battery pack Welding Materials: Welding 0.1~0.12mm thick nickel-plated steel strip Energy setting: Energy must gradually increase from 01, and the maximum cannot exceed 50. Exceeding the above conditions may damage the controller.