Beautiful condition, rechargeable heat storage hot water bottle, electric hot water bottle, no water change required, overheat prevention, instruction manual

This is a rechargeable heat storage hot water bottle!
It takes about 15-20 minutes to charge, and the warmth lasts all night(^^)
It's cordless, so it's stress-free and doesn't require water changes!

[Retail Price] 3999 yen
[Color] Gray
[Size] L
[Specifications] No water change required, rapid heat storage, long-lasting warmth, overheat prevention, explosion-proof function

I used it a few times, but it was a little too big for me, so I'm selling it :')

~~~Quoted from Amazon Official Page~~~

[Large Hot Water Bottle! Rapid Charging & Long-Lasting Warmth] Charging is complete in just 15 minutes. The hot water bottle can keep you warm for about 9-15 hours inside your futon, or about 5-8 hours when used against your stomach or lower back. Place it on your stomach while relaxing on the sofa, or put it at your feet, and it feels like a soft pet snuggling up to you. No more cold feet when you sleep! This large, generous hot water bottle gently fits around the areas you want to warm, such as your hands, feet, stomach, and lower back, providing a gentle, soothing warmth for relaxation.
[Skin-Friendly Hot Water Bottle & Safety Features & 15-Minute Auto Shut-off] Generates no electromagnetic waves, does not dry out the skin, and provides natural warmth! Unlike heating appliances, it doesn't dry out indoor air, keeping you cozy and warm. No more troublesome water changes! Safety features include a 6-layer explosion-proof design, a safety device for electricity, overheat prevention, and a water-electricity separation design to detect abnormalities and ensure safety. No worries about burns, fires, or dryness.
[High-Quality Material & Cordless, Use Anywhere, Excellent Soothing Effect] The benefits of a large capacity are self-evident. Long insulation time and large capacity naturally mean a larger size, which in turn means a larger area to warm your body. The hot water bottle has a soft, squishy texture that conforms closely to your body. Enjoy a comfortable winter with this reusable, toasty warm, heat-storing eco hot water bottle. It warms your hands, feet, back, stomach, and waist. Recommended for those suffering from cold hands and feet, those concerned about coldness in their stomach, lower back, knees, shoulders, or back, those conscious of saving electricity, and those who find refilling hot water bottles troublesome.
[Economical & Energy-Saving] The electricity cost is about 2.5 yen per charge. Since it uses electricity, there are no water bills and no gas bills. The main body has a soft, squishy texture, like it's filled with hot water. [Comes with an Excellent Insulation Cover] The fluffy and cute design of the insulation cover is also a highlight. The cover is removable and washable, so you can always use it cleanly.