Description Materials: Outer nylon diving cloth Inner silver ion cloth Graphene heating core Power supply: Power bank/phone/charging head/USB power interface Color: Black Temperature settings: High 65°C, Medium 55°C, Low 45°C Features 1. Designed specifically for temporomandibular joint disorders, effectively relieving jaw misalignment, difficulty opening the mouth, and facial pain, enhancing comfort. 2. Constant temperature heat therapy promotes blood circulation, soothes muscle tension, and improves jaw deviation and temporomandibular joint clicking problems. 3. Ergonomic design fits snugly around the jaw area, ensuring a more concentrated and deeper heat therapy effect. 4. Reusable portable heat pack, easy to use, suitable for home and office use, providing care for the temporomandibular joint anytime, anywhere. 5. Soft and skin-friendly material, safe, environmentally friendly, and non-irritating, suitable for people with long-term facial discomfort, an essential tool for facial care and pain relief. Notes: 1. Manual measurement error is 2-5 grams. Please understand if a replacement is needed. 2. Due to differences in different monitors, the picture may not reflect the actual color of the product. Thank you very much! 3. SKU color is the same as the product packaging color. Package includes: 1 * Temporomandibular joint disorder hot compress bag