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 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. Strengthen the Lower Jaw: This lower jaw training device helps support jaw muscle exercise. Regular use may assist in toning the muscles of the lower jaw, cheeks, and neck area, contributing to a more defined facial appearance. Facial Muscle Training: The jaw trainer is designed to engage and stretch facial and neck muscles, which may help reduce the appearance of a double chin and support a more sculpted facial profile. Portable and Easy to Use: Its compact size allows for easy portability, making it convenient to use at home or on the go. Simply place it in your mouth and perform recommended exercises. Resistance Training: With resistance levels of 30 to 50 pounds, this device is designed to provide effective muscle engagement. For best results, use as directed for 20 minutes daily.