1. Exercises for the face. This jaw and neck trainer puts resistance on the 30 muscle groups that support the face, chin and neck, allows you to tighten the skin. 2.Helps strengthen the contour of the face, tighten the skin, lift the line of the jaw and prevent double chin. Designed to activate the muscles to improve the vitality of the face and neck. 3.It can be used as a mandibular line practitioner, as well as an inhalation and exhalation respirator for respiratory care.Think of it as a lung trainer that supports the health and efficiency of breathing through breathing. 4.Convenient to carry and lightweight, which allows you to exercise easily anytime and anywhere, and is also an easy device to clean and maintain. 5.Made of food grade ABS and silicone materials, safe and durable, suitable for your workout. It can be reused and cleaned. You can also place it in the dishwasher for easy but efficient cleaning.