Product Name: Hot Water Bottle Size: 26 x 18 x 4 cm Weight: 1.66 kg 【No Need to Replace Water, Rapid Heat Storage Charging, Long-Lasting Warmth】 This environmentally friendly hot water bottle can maintain warmth for up to 8 hours with a 15-minute charge. 【Convenient Portable Insulated Pocket Cover, Gentle on the Skin】 Comes with a soft, insulated cover. It doesn't dry out the air and maintains a skin-friendly temperature. 【Large Size Hot Water Bottle, Cordless, Usable Anywhere】 Large size for long-lasting warmth. Cordless, so you can use it anywhere, convenient for warming cold areas. 【6-Layer Explosion-Proof Design, Safe and Reliable】 Safety is enhanced with a 6-layer explosion-proof design and water-and-electricity separation design. It automatically turns off when exceeding 75°C. PSE certified and registered with the Ministry of Economy, Trade and Industry. You can use it with peace of mind. 【Economical & Energy-Saving】 No need for water and gas bills from electricity use, and it costs about 2.5 yen per charge. Also recommended for winter cold対策. Charging Instructions 1. Open the cover of the main unit. 2. Place the main unit and the heat storage plug on a horizontal and stable surface as shown in the diagram. 3. Lower the arm and firmly insert the heat storage plug into the back of the heat storage outlet. 4. Plug the power plug into the outlet. The heat storage plug will light up and start charging. 5. When the heat storage plug turns off, charging is complete. After completion, be sure to remove the heat storage plug from the main unit and the power plug from the outlet before use. About Low-Temperature Burns Low-temperature burns are burns that occur when the same part of the skin is in contact with something that feels comfortable (a temperature slightly warmer than body temperature) for a long time. The approximate skin temperature in contact with a hot object and the time it takes to get burned are as follows: ● 44°C for 3 to 4 hours ● 46°C for 30 minutes to 1 hour ● 50°C for 2 to 3 minutes 【Peace of Mind Guarantee】 We accept returns within 30 days. If you are not satisfied, we will provide a full refund. Thank you for viewing.