Level 1 (30lb): Beginner The beginner level jaw exerciser packs the right amount resistance to begin strengthening and slimming your jaw and chin. Level 2 (40lb): Intermediate Upgrading to the Intermediate Level can help bring out the striations (muscle definition) in the jaw, reduce any remaining excess skin and fat under the chin and add serious strength to your bite. Level 3 (50lb): Advanced Upgrading to advanced level, further exercise the muscles of the face and neck, reshape your face, strengthen the jaw line, and tighten the skin, resulting in a more youthful appearance. Feature 1.Jaw exerciser can reshape the face, strengthen the lines of the face and neck, resulting in a more youthful appearance. 2.This exerciser is by eliminating fat deposits around jaw and neck to reduce double chin, chisell jawline, promotes face tone firming & chin lift. 3.This shaper reduce cravings by chewing, it is a healthier and more effective way to lose weight. 4.Safety of jaw exerciser for women men: Made of food grade silicone, please be assured use. 5.Jaw workout anytime anywhere: Hands free workout, Exercise in gym, home, office,etc..