Pain Relief and Warmth The 40 76cm large size heating pad uses double spiral heating wires, 2.0cm copper coil spacing (others are 2.2 2.5cm) , an even, densely distributed heater that provides warmth to relieve accumulated fatigue and stiffness. Suitable cold uterus, cold, shoulders, back, neck, legs, knees. . Auto shut-off overheating protection technology The built-in rapid heater heats up the electric heating pad particularly quickly. If you forget to set the timer, it will turn off automatically after 2 hours. The timer LED indicator will decrease by one level every 30 minutes. When the timer light goes out, the heating pad will also turn off for your safety. Avoid low temperature burns! . 6 Heat Levels & 4 Auto-Off TimersOur heating pad features an LED digital controller that provides 6 heat settings 40-60 (104F-140F) allowing you to choose a comfortable temperature and 4 automatic timers. out of range of 0.5H, 1H, 1.5H, 2H to avoid overheating and wasting energy. . Moist and Dry Heat Therapy There are two ways to use the heating pad: moist or dry heat therapy. Wet heat therapy offers deep penetration for more effective relief. Do not soak the heating pad, just spray a fine mist on the surface of the pad. Dry heat is more suitable for relaxing muscles, while wet therapy is more effective in relieving pain. . Soft and removable and washable fabric Microplush and polyester are the most comfortable fabrics for the heating pad, the microplush makes it soft and warm inside and out and retains heat better than any other fabric. And it's easy to clean, the heating pad unplugs the power cord, it can be hand or machine washable. Put it in a washing machine at a temperature below 40C and let it dry naturally. .