Product Size: Height 165mm, Length 145mm, Diameter 145mm Fast heating: 1 second fast heating, so you don't need to wait in the cold winter 3 levels of adjustment: high hot air, low hot air, natural wind Long-term safe use: 1: PTC ceramic heats up, no open flame. 2: Flame-retardant ABS shell, high temperature resistant nylon air outlet, it will not be too hot for your hand. Smart power-off function: When you forget to turn off? After 4 hours, it will automatically shut down and power off; when the machine overheats? It will be automatically power- off; when the machine falls, it will be automatically power- off; when the fan is abnormal, it will be automatically power-off. Convenient to carry: Lightweight design, easy to carry. You can keep it warm on your desk or on the bedside. Low noise: When the heater is operating, there will be no particularly loud noise. So it will not affect your nap.