From the minute you open up the box, you'll realize that you have purchased a high quality product that will not need to be replaced in a few months (like you are probably use to with other trimmers). We manufacture this trimmer using top of the line blades that will never cause you to feel pain or a hair being pulled. Product runs on 2 AAA batteries (not included) We offer a LIFETIME REPLACEMENT GUARANTEE. If you ever have a problem with your trimmer, just reach out to us directly.