I bought this because it was cold in the mornings, but I'm not using it, so I'm selling it. After the first charge, it heats up to nearly 70 degrees Celsius in about 15 minutes. The temperature drops while you sleep, but it was around 40 degrees Celsius after about 5 hours. (The temperature may vary depending on your home environment.) It's cordless, so you can use it anywhere indoors! Also, since it doesn't use hot water or fire, you don't have to worry about pets or children getting burned. If anyone wants it, I'll sell it. Price negotiations are welcome. Thank you. It's getting cold all day, so I think it's perfect for warming up. During the day, you can warm your hands and feet in the living room while watching TV! At night, your futon will be warm, and you can sleep without feeling cold! Shipping method: Will be shipped in a cardboard box. Storage method: Stored at home. Operation: No problems. * I have a cat, so there may be cat hair on it. I will clean it with adhesive tape before shipping. If you have a cat allergy or animal allergy, it's best not to buy it.