Using the Makita HG6530VK heat gun is easy. First, plug it into a power source. Use the push - button to set the temperature according to your task. You can start with a lower temperature and increase it if needed. The slide switch is for adjusting the air - flow level: cooling, low, or high. When using different nozzles, make sure the gun is turned off and cooled down. Then attach the nozzle you need. The integrated rear stand can help you support the gun during nozzle changes. Always keep the 6.6 ft. cord away from hot surfaces. As for safety, never leave the heat gun unattended while it's on. Also, be careful not to touch the hot parts of the gun or the nozzles. When you're done using it, let it cool down completely before storing it in the included tool case. To maintain the heat gun, keep it clean and free of debris. Check the cord regularly for any signs of damage. If you have any issues, refer to the 1 - year limited warranty.