Adjustable with three types of weights: 18g, 23g, and 28g. By shaking your head, resistance is created to train the facial muscles and lift them up. I used it a few times and then stored it, so I think the condition is good. The box is also clean with no noticeable scratches or damage. The mouthpiece has been sterilized, but can be purchased separately. Please understand that this is a used item before purchasing.