Specification Available Ship to:United StatesDetails Intuitive Using: This electric portable heating pad device uses USB charging which is more convenient. It has three different adjustable temperatures and three different massage modes, you can choose the mode according to your needs. Automatic Design: The portable heating pad is designed to automatically shut down. If you fall asleep during use, our product will automatically turn off within 30 minutes when it detects that you have not made any movement, which can ensure your safety. If you want to use it again, just turn it on again. More Ergonomic: The back of our heating pad adopts a very soft and comfortable contact surface, which can make you comfortable and can dissipate heat evenly. Considering the size of the waist, our waistband is adjustable, and can up to 50'. Wild Applications: You can use our products in different scenarios, whether you are resting, reading, driving, or working, it will not have too much influence to you. Constant Improving: From hot water bottles to warm waist stickers, they are very limited to the human body. Compared with our previous product, the new generation of our heating pad costs more, but doesn't require an external power supply. It just need to be fully charged in time, you can enjoy warmth.