Fill it with and make that the switch is turned off refilling. Introduce the tank into the air hole and press down to inflate. About 10 seconds, the filling can be completed, wait a few minutes, wait for the to stabilize, and then use it. If there is a sound in the tail after filling the , use a pen tip to slightly press into the air port to eliminate it. Ignition operation 1. Replace the soldering iron tip 2. Push the switch to the ON position and hear a "" sound. 3. Push the electronic switch to . 4. After lighting the fire, burn for 3 minutes. When the fire is extinguished, the soldering iron tip will continue to heat up. 5. Adjust the size 6. The temperature of this product is as high as 1300 degrees (the temperature of the soldering iron is 450 degrees). pay attention to safety when using it. Turn off the switch after use. 7. When using a soldering iron, pay attention to wait until the is completely eliminated and the object inside the soldering iron turns red performing the operation to prolong the life of the soldering iron tip. Colour: as shown Material: ABS Package Contents: 1 set x welding kit Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.