Description Fast heat-up time of 3-5 minutes - Ready to use the glue gun in 3-5 minutes. It quickly and automatically heats up the temperature. Wide application. Glue guns can be used for toy model, artistic flowers, decorations, metals, wooden products, cardboard, electronic circuit, etc. The built-in fuse prevents overheating and with the heat protection sleeve on the hot glue nozzle you can protect it from burns. This glue gun is the diameter for 7mm Thread the glue cartridges from the tail of the glue gun, send them to the glue gun. Push the glue gun to preheat 3-5 minutes to move the trigger and extrude the melt glue and control the melt glue sticks. While its running. If the hot melt cartridges are inexhaustible in a time, then the hot melt cartridges should not be removed. It will melt and be used if you use your glue gun. Warning: Do not pull the glue stick from the back of the hot glue gun. If the glue stick is partially used in the gun, please stop sticking before putting on a new one. 2. Please turn off the red switch and use the metal bracket. 3. If the glue gun does not work continuously for 15 minutes, please turn off the power supply. 4. The glue gun must not be disassembled or modified.