i suggest you go to youtube and watch some videos before you purchase [SEP] i will not rate this product until i use it but i suggest you go watch a youtube video before purchasing any of these jaw exercisers not seen a video on this product i was not sure how to use iti will try to make a review on this item after i use it for a few weeks and see the results i will give it a two star rating only because it did not have a video to go with it