One of the best features of these trimmers is all sizes in one guard. Over the years I have found the most annoying feature of hair clippers is all the gaurds to keep track of, whether the dog eats one, or you loose one, these trimmers bypass that problem. With a single adjustable guard you never risk loosing a guard because you don't need to change out gaurds for different lengths. With a rechargable battery your not stuck juggling the cord, a mirror, and the mess your making but are free to head outside to make cleaning up easier as well as get those hard spots behind the ear without the hassle of a combersome cord pulling the clippers in different directions. The guard is rounded to make your trim scratch free. These clippers allow me to articulate the kind of styling to bring out the angles of my face. So far my favorite clippers I have ever owned. I highly recommend these clippers.