Natural convection circulates warm air silently. Digital display with adjustable thermostat， 39 F to 90 F (degree Fahrenheit) and auto-off timer， 1 to 8 hours. Lightweight with carry handles for portability. Built-in safety features include tip-over safety switch and automatic overheat protection. Constructed of flame resistant plastic and metal. Neutral color and low-profile blends easily with decor. Works most effectively in a small to medium sized room. Not recommended for use in bathrooms， laundry areas or similar locations. 72 In. cord length.