The safety slider switch of the mini soldering iron pen prevents accidental activation when not in use. The radio soldering iron can heat up in seconds and can solder without a socket. It is very convenient to carry in your tool bag. Mini soldering iron, the voltage is 4.5V and the power is 8W. The portable soldering iron requires 3 x 1.5V AA batteries. The electric soldering iron can be used for ordinary circuit board soldering, precision small parts soldering, automotive electronics repair, communication electronics repair, ship electronics repair, and loosening corroded metal screws. The cordless soldering iron has a fast heating and fast cooling design. And it has a long-life soldering iron tip with a protective cover to better protect the components.