3S Fast Heating & PTC HeatingOutdoor patio heater adopts advanced PTC ceramic heating element, which provides 3S fast heating, produces more heat, and is more energy efficient than ordinary heaters. Always warm you and your family this winter. Intelligent Thermostatic Control SystemBuilt-in overheating protection and automatic transfer switch. The heater stops automatically when the temperature reaches 90C, and restarts automatically when the temperature drops to 75C. Heaters will make your life easier and provide more security. 3 Heating Settings HeatingThe bathroom heater provides 3 heating levels (1800W/1000W) and a soft cold air fan mode (15W), which can not only bring you warmth in winter and cool in summer, warm hands and feet, and warm your feet. Our fan heaters will also work at night and are designed without lights to not disturb your sleep. Low Noise and Energy SavingOur electric heaters are more energy efficient and quieter than traditional ones, working as low as 47 decibels. Automatically adjusts heating mode based on ambient temperature - This heater saves on electricity bills while keeping you comfortable.