Indoor Use: The SPT-3 flat plug extension cord is designed for indoor use, certified by UL, It caters to various household electrical needs, accommodating appliances like microwave ovens, electric heaters, computers, and Christmas lights. It's flat plug design allows for efficient space-saving, enabling you to place furniture closer to the wall without obstruction. Extensive Product Range: As a leading brand in extension cords, we offer a wide variety of options to cater to your specific needs. Explore our collection of extension cords, including waterproof extension cord covers, flat extension cord power strip, and multiple outlet options in various gauges, colors, and sizes.