1.Environmental material, safe use: this electric rechargeable heating bottle with fleece cover, inner pocket plus velvet, you can put your hands in to keep them warm. The cover material is high quality fabric, soft and comfortable, skin-friendly. The charging port, charging cable with safe material, it will be shut off automatically, safe explosion proof. 2. Ease Aches for Your Comfort: With classic color and soft hand cover, the multifunctional helectric heating pad great for treating sore muscles, stress or cramps, help arthritis and pain relief, soothing fatigue, lower back pain, menstrual pain and other common aches 3.Long time keep warm,rechargeable heating pad: our winter electric heating bag can keep warm in long time, about 2-5 hours indoor, in the bed about 6-8 hours(theoretical time). Update style is better use than the hot water bag without electric, our electric heating pad is rechargeable, energy saving 4.Easy to use: if want to use it, first fill about 1100ml water into the bag,then use the stopper to stop water spill out. Insert the charging port on the hot water bag first, then connect power supply when charging. The heating bottle will auto shut off when the light turn to red.