• Versatile training kit: Use it as an oral muscle trainer or toothbrush, ideal for children and adults over 3 years old. • Includes interchangeable heads: Round massage head, flat head, and toothbrush head to suit your needs. • Easy to operate: Works with a single button, perfect for people with dysphagia or lisping. • High-quality material: Made of ABS plastic with a glossy finish that does not scratch the mouth or tongue. • Therapeutic benefits: Helps massage oral acupuncture points, strengthens oral muscles, and improves tongue flexibility and stability. • Specifications: Works with 1 AAA battery (not included).