Apex Tool Group ML500MP Mini Butane Soldering Iron For Use In Soldering, Heat-shrink Tubing & Electronics Adjustable Gas-flow Valve Controls Temperature Range 750deg F-900deg F Tip Temperature Use For Soldering, Heat-Shrink Tubing and Electronics Adjustable Gas Flow Valve Controls Temperature Range Tip Temperature: 750-Degree f - 900-Degree f Up To 30 Min Continuous Use On Medium Setting Window Allows User To See Fuel Level