The heating pad heats up quickly, no need to wait. When you press the switch, there are 3 temperature levels for you to adjust; when the power is on, the indicator light turns red for high temperature, blue for medium temperature, and green for slight heat. For your safety, it will automatically switch off after 2 hours of continuous operation. The electric heating pad is made of adjustable Velcro and elasticated straps, suitable for all kinds of waistline. Adjustable wearing belt with wide straps for perfect fit around the waist, lumbar area, abdomen, belly, lower back, waist, legs, knees and neck. When you use it, please put your clothes or towel in the middle, and remember not to use the product in direct contact with the skin to prevent burns. The electric heating pad is 48 inches in total length and can be folded and carried. It can be used in various places such as bedroom, living room or office. Our warm waistband is perfect as a gift for friends and family, such as birthday gift, Thanksgiving gift and Christmas gift. Suitable for girls who use it during their periods. This rechargeable back heating pad has a built-in protection module. Once overheated, it will stop working until the heat returns to standard temperature. Please turn off the power and adapter, wash the product with warm water, dry it and store it, no need to worry about leakage, safe and reliable. But be careful not to machine wash it. Note: Do not use the electric heating pad within one hour after meals. Use 1-3 times a day, 10-60 minutes each time, not more than 2 hours. Drink plenty of water during and after use to flush out waste. Do not touch cold water for half an hour after use to avoid getting cold. Do not connect this product with other adapters. The waist warmer belt is only used to heat body parts and wounds should be avoided.