Portable USB Fan Heater With a small fan in hot summer, no heater in winter ~ The shell is selected PP material, built-in professional PTC ceramic heating element and 3600rpm silent fan? High-efficiency heating, automatic constant temperature without oxygen consumption, that is, heat energy, power 500W, energy saving and environmental protection said ~? There are also hot grooves in the back, no radiation, no open flame, which is an ideal home, office small appliances. How it works. The motor is used to drive the wind blades to rotate, the air is circulated, and the cold air passes through the electric heating element of the heating body to form a heat exchange to achieve the purpose of heating. Equipped with an internal thermostat, the power supply itself can be cut off when the air outlet is blocked by a fan. Pay attention to the use of heaters.1, do not dry clothes directly on the heater, do not set the drying rack electric heater, and never cover the heater on the clothes. Doing so, on the one hand, can avoid burning clothes, on the other hand, it can also prevent the heat transfer oil pressure inside the heater housing from rising, resulting in heat transfer oil, shell expansion and cracking.2. Pay attention to waterproofing when using in the bathroom, even if it is a waterproof heater, do not get too close to the bathtub, basin or shower, and avoid spraying water directly on the bathroom heater when bathing.