Portable Multi-functional Metal Cordless Gas Soldering Iron Pen Heating Tool Material: durable aluminum alloy and hard plastic. Power: 70W-100W. Cordless gas soldering iron, no electricity or batteries required for operation. Can be used to melt silver and gold solder, small brazing rods, and many other materials (gold, silver, copper, tin, aluminum). Refillable design: Widely use available butane gas. Soldering iron temperature: 210C to 400C. Flame temperature: 1300C (2500F). Gas container capacity: about 7ml