1、1. It can be used to exercise the flexibility of the tongue, and is suitable for people with language barriers such as slow speech, stiff tongue, and incomplete tilt. 2、2. Specially train the muscle strength, flexibility and stability of the tongue. Improve tongue muscle strength and tongue coordination. 3、3. It is a professional tool for the trainer, which allows the trainer to independently control the flexibility and stability of the tongue. 4、4. There are two ways to use alternate exercise training up and down, left and right, you can choose according to your own situation. 5、5. Mainly solve the language development problems of children and the elderly, such as unclear children's tendency and unclear speech of the elderly. Size: 15x5cm / 6x2 inches material: plastic 1*Tongue training device (random color)