This is an electric heating hot pack (coarse salt thermal pad) from Beijing Tong Ren Tang. It has 9-level temperature adjustment and a timer function, allowing for comfortable use depending on the area of use and physical condition. Number of uses: Only a few times (storage period approximately 1 year) Condition: No noticeable stains or damage Purchase date: Approximately 1 year ago Safe usage period: 3 years according to the manufacturer Heating method: Electric heating (9-level temperature adjustment possible) Structure: Double coarse salt bag Materials: Linen-like cover + natural sea salt + mugwort (yomogi) Applicable areas: Lower back / abdomen / stomach / shoulders, etc. Power supply: Household AC outlet [Precautions for this product] 1. Do not fold or wrinkle. 2. Do not fold during use or storage. 3. Do not insert pins. 4. Do not use when wet. 5. Do not allow use by those with physical disabilities, infants, or those who are not sensitive to heat. 6. This device is not intended for medical use in hospitals. 7. Use only with the controller included at the time of shipment of this device. 8. Only use with the same model: DT 600 x 200 sea salt pack. 9. Prohibited for use by those with high blood pressure, diabetes, heart disease, or malignant tumors. 10. Prohibit long-term high-temperature heating; the energization time should not exceed 1 hour, and turn off the power when going out during energization heating. 11. The safe usage life of this device is 3 years. ※ As this is a used item, there may be some deterioration due to aging and hardening of the internal salt. ※ Although within the safe usage period (3 years), please understand that we are not responsible for any problems or malfunctions caused by use, as this is a personally stored item. Please purchase with your understanding.