CAUTION: Do not over-turn the gas valve knob before ignition, slowly open the gas valve knob and press the igniter to start ignition after the CGA 600 standard port is connected to the propane fuel cylinder and you hear a small amount of gas escaping. Otherwise, excessive propane gas flow will cause ignition failure. Powerful Output: The larger nozzle and high firepower weed burner torch has a heat , and the design produces a powerful flame for makes quick work of those stubborn weeds. The weed torch burner has a full length of 36 inches, no more bending over too far or getting too close to the flame; 2 Working Modes of Weed Burners: The first one: you can connect this weed torch directly to the propane cylinder when you are doing weed burning outdoors. The second one: use the high pressure hose to link the weed torch and the gas cylinder, so that it can be stretched farther and safer to use; Lights Up Quickly: the weed burner torch comes with an upgraded piezo electric technology one-button ignition that helps you to light the flame quickly and safely without having to fiddle with matches or lighters fully functional. The propane torch weed burner's gas control valve allows you to easily adjust the size of the flame; Easy to Operate: After the weed burner torch is connected to a propane cylinder, turn the control knob to adjust it and let the gas flood into the torch, then press the one-button ignition device and you're done! The weed burner is extremely easy to operate, and the Propane Torch Weed Burner can be connected to all propane fueled cylinders with the CGA 600 standard connector (Note: Propane fuel cylinders are sold separately); Weed Torch Propane Burner, Propane Torch Weed Burner with Igniter, Removable 36'' Long Arm Torch, for Outdoor Weeding