Using the SparkFun Heaterizer XL - 3000 heat gun is easy. First, make sure it's plugged into a 110v power source. Then, turn it on and wait for it to heat up. It heats up quickly, so you can start your heat - shrink or melting tasks right away. When using it, keep it at a proper distance from the object to avoid overheating. Don't use it near flammable materials. After use, let it cool down completely before storing. Regularly check the power cord for any damage. If you need more detailed instructions, refer to the Instruction Manual.