Specification: 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. Package List: 1 x Controller(Battery Not Included) 1 Pair of Welding Pen 1 Pair of Power Input Line(Red and Blue) 1 x Power Access Plug Note: 1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Spot Welding Machine Set only, other accessories demo in the picture is not included.