Exothermic Technologies Pulsefire Backpack Kit for Flamethrower

From the manufacturer:

The Pulsefire backpack kit turns your handheld flamethrower into a professional controlled burn system.

A 3.3 gallon reservoir supporting over 4 minutes of fuel means an incredibly high capacity of real-world use.
(If you held the trigger nonstop, it would yield over 4 minutes of use before running empty)

The backpack is extremely manageable at only 26 lb with fuel. The slim design keeps the weight close and comfortable. This is the ultimate in controlled burn capability in a man-portable package.

It’s also easy to switch back and forth between backpack and handheld if your needs change!