Specifications: With a LCD display screen, the controller can display welding parameters. This controller is mainly for welding 0.1mm to 0.15mm nickel-plated steel strip. Using Instructions: 1: Power Connection The controller comes with a 20cm long 10AWG input wire, one end has been crimped with the U-shaped terminal, and the other end has not been processed. Connect the crimped U-shaped terminal to the input end of the control power supply, and handle the other end according to your own power supply. Note that the positive and negative poles should not be connected wrongly. 2: Switch Machine There is a power switch under the control panel. After pressing it, wait for 3 seconds, after the buzzer beeps, the LCD lights up and the boot is completed. Press the power switch again to shut down. 3: Welding Press the welding pen obliquely on the nickel strip to keep the welding needle clean. According to the actual test, if the welding needle is ground into a round head, the welding effect can be improved. There are two welding methods, manual and automatic. Item Name: Spotwelder Material: Metal Power Supply: 18650 Battery or 12V Automobile Battery Battery: 18650 Battery (Not Included) Features: Portable, Durable, Welding Tools Size: 10cm x 5cm x 2.6cm/3.94" x 1.97" x 1.02" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Spotwelder 2 x 40cm Soldering Pens with Soldering Pins 1 x 20cm Red Power Input Line 1 x 20cm Blue Power Input Line 1 x Connector 1 x User Manual