First off, can you see in the picture that the tool says "Battery Rotary Tool" on the side? Yes, it's weird because it's definitely wired. Also, the very poor instructions that came with the kit refer to a different tool. Maybe for the wireless version? I have the impression that the manufacturer is dissolving. Since the guide is a different tool, you're definitely on your own in this regard. Don't get me wrong, for the price I could be missing out on a lot of nonsense. This is a decent set for beginners and amateurs like me. The speed control is a little rough and difficult to get accurate; It seems like it only has a few steps instead of constantly changing. I can't test it either, but it seems to me that my old Dremel has a higher RPM. However, it will be a useful tool for many uses. It comes with a wide range of grinders, polishers and brushes, as well as additional cartridges. It also comes with two spare motor brushes, which leads me to suspect they expect the motor to die eventually. The block is easy to open and replace the brushes if necessary. This is a tool for people who don't plan to work with it much or want to explore the possibilities of a rotary tool but don't want to spend a lot of money. If you're more serious, go for something more professional.