Infrared quartz offers healthier heat that does not take the humidity or oxygen out of the air. It produces a more enjoyable and comfortable heat, ideal for those suffering from allergies. Energy-saving LED display controls for the adjustable thermostat (62° F – 82° F) and 9-hour auto shut off timer give you control over your environment. 3D Flame Effect for realistic flames that dance on and behind the logs or crystals, 5 flame colors, 5 flame speeds, 5 flame brightness levels.