bad design unusable trimmer [SEP] when my non vacuuming norelco trimmer would no longer take a charge i ordered this item not too concerned over whether the vacuum was effective or notwhat i received was a poorly designed trimmer to hold the trimmer one must place ones hands over the vacuum air exit slots thus throttling the vacuum the guard was so complex to attach and detach that it took minutes each time to do it the closeness settings do not actually lock in and tend to wander toward the closest setting and so i would find myself completing my trim with length hair on one side of my face graduating to stubble on the otheri finally threw the thing in the garbage after a week and bought a leftover non vacuum norelco model like the one i previously had so if you see some poor soul walking down the street with long whiskers on one side of his face and a of the clock shadow on the other be kind he is probably not dimented just the victim of this new and improved beard trimmer