There are three speeds: It reduces the temperature and refreshes the air through water evaporation. Please put it no more than 3ft-4ft beside you. 10W portable air conditioner table mini personal space air cooler with USB power performance. It is not only an personal air cooler, but also an air humidifier. You can use the small evaporative air cooler all year round, cooling you in hot summer and humidifying the air in dry autumn and winter. Timing function: 3 kinds of automatic timing (1H / 2H / 3H), you can choose the most suitable one to enjoy your leisure time, sleep or working time. Colour might be slightly diffrent from the uploaded image.