【Warm & Cozy Rechargeable Hot Water Bottle - Perfect for Winter Cold Protection】 No need to bother with refilling with hot water! This rechargeable eco-friendly hot water bottle can be used repeatedly. It's cordless, so you can move it away from the power source after charging, making it usable in various places like bedrooms, living rooms, and offices. In cold weather, you can use it as a hand warmer on your lap, as a bed warmer in your futon, or warm your feet like a kotatsu by placing them on top of the hot water bottle. It's a must-have item for winter cold protection! 12-Minute Rapid Charging, 4-10 Hours of Long-Lasting Warmth】 Just plug it into an outlet for about 12 minutes to charge, and it will stay warm for 4 to 10 hours. It provides a gentle and comfortable warmth for about 10 hours in a futon and about 4 to 5 hours when used on your stomach or lower back. (※ The specific warming time may vary depending on the usage environment.) Highly recommended for those who suffer from cold hands and feet, those concerned about a cold stomach, and those who dislike the dryness of heating. Skin-Friendly Fabric, Easy Care】 The insulation cover of the electric hot water bottle uses high-quality artificial rabbit fur, which is fluffy, soft, and has a moist touch, warming both your body and mind. Attaching the dedicated insulation cover not only prevents low-temperature burns but also increases the insulation power. You can sleep comfortably until morning if you put it at your feet when you go to bed. The cover can be removed and washed, so you can always use it cleanly and with peace of mind. Multiple Safety Protection Design, PSE Certified】 ① Complete separation of water and electricity structure ② 6-layer explosion-proof PVC material ③ Use of non-corrosive water ④ Equipped with a pressure detection chip (detects abnormal pressure to ensure safety) ⑤ Overheating prevention function (automatically turns off the power at 70℃ or higher) ⑥ PSE certified & METI (Ministry of Economy, Trade and Industry) registered. You can use it with confidence thanks to strict safety standards and multiple protection features.