Product features:     1. Using aluminum alloy shell, CNC lower layer process, providing 2 kinds of battery capacity to choose from.     2. Wide range of applications and stable performance     3. One piece welding pen, built-in high rate battery, excellent charging and discharging performance, easy to operate     4. Compact, hand-held portable spot welder, the size of an ordinary rechargeable battery     5. With quick release soldering pen, good conductivity, stable temperature, fast heat conduction, good performance     Product parameters:     Style 1: 5000mah     5000mah can be filled with more than 500 times.     Battery internal resistance 1mΩ, can be point 0.2mm within the nickel-plated tape, 0.15mm pure nickel tape     Style 2: 10000mah     10,000mah can be filled for more than 1000 times.     The internal resistance of the battery pack is 0.5mΩ.     Can point within 0.3mm nickel-plated steel belt, 0.2mm pure nickel belt, 0.1mm copper skin and steel bottom welding        High definition IPS LCD screen, accurate display of all values at a glance     Contents of the display:     1. Welding power level.     2.2. Power display.     3. Spot weld count, +1 for each spot weld.     4. Battery voltage.     5. Set the trigger queue value, greater than the read value (6) will trigger the weld     6. Weld reading value     7. Battery temperature     8. The sign that the soldering operation can be carried out     Caution.     To solder soft pack batteries with aluminium lugs to nickel, use aluminium-nickel composite tape.     Please use a compliant charger for charging, and pull out and store the spot welding pen when not in use.     When the battery is low, please recharge it in time. Storing it empty for a long time may also cause the product to fail.     Do not short-circuit the tip of the soldering pen directly when switching on.           Product list:     Spot welder x 1     Spot welding pen x 2     2m nickel plated x 1     Charging cable x 1