3 Adjustable Speeds: The Mini Fan has 7 fan blades which provide strong wind. You can adjust the level of 3 gears (low/medium/high) by pressing the power button repeatedly. Portable Fan: The portable fan equips a cord. When you go out, you can hang it around your neck, especially suitable for travel or outdoor sports in summer. Rechargeable Battery: The USB fan is powered by the rechargeable polymer lithium battery. You can charge by computers, power bank, laptops and other USB port devices. Mini Size: This mini fan is only 65g and 6x3x11.5cm. When you go out, the fan can be held in your hand or in your pocket. Ideal for home, office, outdoors and travel. Low Noise: The brushless motor helps the USB fan to run quietly even at the highest speed. The noise is down to 40 dB.