Weller Cordless Butane Soldering Iron & Heat Tool Kit. Butane powered (butane not included). Features quick and easy butane refills with a viewing window and quick-recharge design. Provides continuous, non-stop soldering with up to 60 minutes of continuous use. Easily converts to torch for hot air/torch applications. Tips can be changed without a tool. Automatically shuts off into a locked position when the cap is closed. 25W-75W.