3 Speeds Adjustable: The mini fan has 7 fan blades to provide strong wind. Press the power button repeatedly to adjust 3 levels (low/medium/high). Portable Fan: The portable fan comes with a power cord. It can be hung around your neck when going out, especially suitable for summer travel or outdoor sports. Rechargeable Battery: The USB fan is powered by a rechargeable polymer lithium battery . You can charge it via computer, power bank, laptop and other USB port devices. Mini Size: This mini fan weighs only 65g, 6 x 3 x 11.5cm. When you go out, the fan can be carried by hand or put in your pocket. Ideal for home, office, outdoor and travel. Low Noise: The brushless motor helps the USB fan to run quietly even at the highest speed. Noise is reduced to 40 decibels.