Heavy-duty, stainless steel construction. Base has wheels for easy portability. 1500 watt heat setting warms even in cold conditions. Long-lasting, 5,000 hour lamp. Efficient 90% energy conversion rate reduces energy costs. Our energy-efficient Offset Infrared Patio Heater works by warming you and your guests, not the surrounding air, and excels even in breezy conditions. This outdoor heater runs on regular 110 volt household current instead of propane, and will warm everyone within 9'. Telescoping pole is fully adjustable, allowing you to direct heat efficiently. . . . . . Completely silent operation with no UV rays, harmful emissions, or toxic residuals. Automatically shuts off if the heater is tipped over. Can be used indoors as well.