Smart "Mini Air Cooling Fan" with a touch design, like smart touch screen mobile phone, just lightly touch the desired function can be achieved, a good experience! Ordinary "Mini Air Cooling Fan" hardware button you know, very hard, the operation feel very bad, but the key is easy to get stuck or broken or something. Another smart fan also uses a 32-speed stepless adjustment, you can fine-tune the wind speed between stalls, to the cooling effect you want, ordinary "Mini Air Cooling Fan" of the three files you know, or too much wind, or the wind is too small they might even blow cold. Under the contrast between the two, the average fan directly weak burst!