Material: Silicone Size: 3.5*3.8*4 cm Color: Black, Blue Resistance: 30 Lbs, 40 Lbs, 50 Lbs Package Contents: 1 x Jaw Training Ball 1 x Lanyard 1. High-Quality Materials: Our jaw trainer is made of food-safe organic silicone to ensure safe use. The chewable part can be disassembled and cleaned. It is not a disposable product and can be reused after cleaning. 2. Strengthen the Lower Jaw: This device is designed to help exercise the muscles of the lower jaw. Regular use may support muscle toning in the jaw, chin, and neck area, contributing to a more defined facial appearance. 3. Muscle Engagement: The jaw trainer helps engage facial and neck muscles through resistance exercise, which may assist in reducing the appearance of a double chin and promoting a more sculpted look. 4. Portable and Easy to Use: Its compact size allows for convenient portability, making it easy to carry and use anywhere. Simply place it in your mouth and perform recommended exercises. 5. Resistance Training: With resistance levels ranging from 30 to 50 pounds, this device provides progressive training for the facial and neck muscles. For best results, use as directed for 20 minutes daily.