Using the Bosch GKS18V - 25CN circular saw is easy. First, make sure you have a fully - charged CORE18V battery (sold separately). Insert the battery into the saw. When you're ready to cut, hold the saw firmly with the main handle and the auxiliary handle for better control. You can adjust the depth of the cut according to your needs. To change the bevel angle, unlock the bevel and set it to the desired angle between 0 - 50°. There's a bevel lock at the front to keep it in place. When you're done cutting, use the electronic convenience brake to stop the blade quickly. This will save you time if you need to make another cut. Remember, the connectivity module is sold separately. If you have it, download the Bosch Toolbox App on your device. You can then connect the saw to the app and get detailed feedback. For maintenance, keep the saw clean. After each use, use the 360° pivoting dust port to direct dust away from the body. If there's a lot of dust, you can attach a vacuum hose. Check the blade regularly for wear and tear. If the blade is dull or damaged, replace it with a new 7 - 1/4 inch 24 - tooth carbide circular saw blade. Also, store the saw in a dry place. Bosch 18V cordless power tools are covered by a five - year limited warranty. If you have any problems, visit https://rb - pt.io/PowerToolWarranty or call 1 - 877 - BOSCH99. And don't forget, there's a 180 - day no - questions - asked return guarantee for all Bosch 18V PROFACTOR cordless power tools.