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Electric Hot Water Bag For Period Relief, Easy To Carry, Rechargeable, Multiple Use, etc.The Rechargeable Hot Water Bag takes 8-15 minutes to finish heating. Keep warm for 2-8hrs (influenced by the ambient temperature). It is sold without water, use the funnel to inject 1000ml-1200ml water into it and make sure there is No Leakage before charging. No need to change water, which saves precious water resources and prevent burns from boiling water.Ideal for warming hands, feet, stomach, back or bed in cold winter. In addition, it can be used as a heating pad to relieve pain, sore muscles, stiff necks and dysmenorrhea. What's more, you can use it as a small pillow for a nap at the office.Built-in auto shut-off device to prevent overheating. The inner layer is made of 6-layer PVC material, which is explosion-proof, pressure-proof and leak-proof. The high quality materials makes it a reliable product.The fabric is made of skin-friendly fleece, and the lining is padded with cotton to give you a feeling of softness and comfort. The inner layer is made of 6 layers of PVC material, which is to provide you with excellent insulation for a long time. Dimensions: 7" x 9.84"/ 18cm x 25 cm. Perfect to be held on hands or put in a bag. It has a front pocket to warm your hands. Great for indoor and outdoor use.