1. [Easy to practice] The mandibular exerciser is small in size and comfortable to wear. It is an exercise tool that can be exercised anytime, anywhere. 2. [Healthy material] The jaw exercise tool is made of food-grade silicone, non-toxic, tasteless, and safe to chew. 3. [Weight loss] Using the jaw ball trainer, chewing has been proven to increase metabolism, reduce cravings, and thus reduce weight. 4. [Suitable for everyone] The chin line fitness ball can be individually adjusted according to the shape of the mouth, and it can be used by anyone, regardless of age or gender. 5. [Effects of use] The double chin exercise ball can strengthen the chin line, tighten the face and neck, and make you look younger. Product description Features Strengthen the muscles of the chin, face and neck. The product can exercise, attractive contours and chin lines. It promotes facial blood circulation, tightens the skin, and eliminates wrinkles. Facial muscles can be trained to reduce sagging skin. The first step: before each exercise, thoroughly clean the lower jaw exercise ball. Step 2: Bite the bite belt and place it in the correct direction. Step 3: Fast bite, hold the position for a few seconds, and then slowly relax the chin muscles. Step 4: Repeat this process, it is recommended to practice for 10 minutes every day. Specification: Name: 2 Chin Fitness Ball Material: Silicone Color: blue, purple Weight: 25g Packing list: chin fitness tool*2