Description: 【Easy To Use】When the electric soldering iron is used for the first time,it must be preheated for a few minutes.It is normal to have smoke,and it will disappear in seconds. Straighten tin wire,press the tin inlet,and insert it from the tin inlet until it contacts the soldering head,until it touches the soldering iron head,stop threading until the tin wire is sent to the tin guide pipe mouth,and then pull the to work normally. 【 Handed Operation】Soldering iron kit feeds the Welding wire through a stepper motor,allowing you to solder effortlessly with hand Without feeding solder with the other hand,When it is necessary to withdraw or replace the tin wire when it is stopped,just push the plate direction upwards and take out the tin wire at the same time. 【Unique Design】Electronic welding torch the design of the side can always observe the internal operation,it is also convenient to replace the heating the future,stainless steel casing, more durable.Also has an integrated power switch,which is more energy saving,safe to operate and use,and does not need to be plugged and unplugged frequently every time. 【Safety Design】Hand electric tin feeding machine uses an anti bend tail wire to prevent the wire from bending during use,which can effectively improve the service life.Self reset ratchet buckle has self reset function and good ratchet forward feeling. 【Application】Welding repair tool widely used for welding circuit board,appliance repair,jewelry and metal headdress making,computer,and DIY.Very suitable for beginners,welders,basic household equipment,welding engineer training,etc. Size Chart: 19cmx20.5cm/7.48inchx8.07inch  Package Includes: 1 Electric Soldering Iron Note: Please allow slightly errors due to manual measurement and different monitors.