ITEM NAME:Exercise Fitness Ball Neck Facial Muscle Toning Lifting Jaw Fitness Yellow Description: This fitness jaw exerciser can train the masseter muscles, tighten and strengthen the face and neck area. Easy to use. Install it and use it directly. Shrinking your double chins makes you more confident. There are 3 kinds of intensity, corresponding to 3 different colors, yellow first-class intensity (30 pounds); blue auxiliary intensity (40 pounds); gray-scale three-level intensity (50 pounds) When you are on the way to work, in front of your computer or even watching TV at home, it only takes 10-15 minutes a day. You can also combine it with the current exercise to achieve maximum effect. Combining this equipment with regular exercises can increase the blood flow of the entire head and face to complete the whole body exercise. Note: Suggest you start at level 1 (Yellow) and gradually go to level 3 (Gray), as you mandibular muscles need to activate and become stronger. Specification: Material: Food Grade Silicone Length: 4cm/1.57inch Package Includes: 1 Piece Toning Jaw Muscle Ball 2 Piece Bite Strip Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement. SKU: DMO0019735462030589.This fitness jaw exerciser can train the masseter muscles, tighten and strengthen the face and neck area. 1 Piece Toning Jaw Muscle Ball. You can also combine it with the current exercise to achieve maximum effect.