A. Environmentally friendly materials for safe use: This rechargeable electric thermos with a furry cover has added velvet to the inner pocket, allowing you to put your hands in it to keep warm. The cover is made of fabric, which is soft, comfortable and skin - friendly. The charging port and charging cable are made of safe materials. It can automatically cut off the power and is explosion - proof. B. Relieve pain and enjoy comfort: This multifunctional electric heating pad has classic colors and a soft hand - held cover. It is suitable for treating muscle soreness, stress or cramps, helps relieve arthritis and pain, and soothes common pains such as fatigue, low back pain and menstrual pain. C. Long - lasting warmth, rechargeable electric heating pad: Our winter electric heating bag can keep warm for a long time, about 2 - 5 hours indoors and about 6 - 8 hours in bed (theoretical time). The upgraded version is better than non - electric hot water bags. Our electric heating pad is rechargeable and energy - saving. D. Easy to use: If you want to use it, first add about 1100 ml of water to the bag, and then use a plug to prevent the water from overflowing. First insert the charging port into the hot water bag, and then connect the power supply when charging. When the indicator light turns red, the thermos can automatically cut off the power.