Upgrade Heating WireThe heating wire of the electric foot warmer adopts the latest heating technology, triple safety guarantee - NTC overheating protection system, PTC temperature monitoring system and PVC insulation layer. Let you enjoy the warmth brought by the hand and foot warmer in a safe environment. The total length of the power cord of the controller: 2M, allowing you to easily control the feet warmers while lying down. Time & Temperature SettingThe heat pad can set 6-level temperature (104F-140F), which is convenient for you to choose the most comfortable temperature. The 4-level timer function (30/60/90/120 min) makes the heated foot warmer automatically power off. Even if you fall asleep, you don't have to worry about the burn or short circuit caused by the constant heating of the leg warmer, which makes you more assured. Turn off and unplug after use. Easy to Clean & StoreWaterproof power design makes the large weighted heating pad easy to clean, just unplug the controller and put the foot warmer in the washing machine, please let it dry naturally. Tens of thousands of folding tests have proved that the heating wire has extremely high toughness and will not short-circuit and leak. When not in use, the back heating pad can be folded and rolled up for easy storage. Best Gifts in WinterAre you still worried about birthday, Thanksgiving, Christmas gifts? Please send warmth to your family and friends this winter. Whether at home, at the office, or on the go, heating pad for back pain relief promote blood circulation in the abdomen, feet, hands, shoulders and back, relax muscles and relieve fatigue.