[USB rechargeable] Built-in capacity 4000mAh lithium battery. This mini battery powered fan is compatible with all USB ports so you can charge it with any USB device. [5 Level Adjustable, One Button Design]Compared with similar products on the market, the mobile fan has been innovatively upgraded to 5 wind speeds to meet your needs in different situations. In addition, -button design allows you to switch between different wind speeds by pressing the button and turn off by pressing the button for 3 seconds. [LED Display]The personal fan comes with a digital display that shows the current wind speed and battery level during operation. Additionally, the battery level indicator on the mini fan reminds you to charge this mini fan before it runs out of power. [Rapid Cooling & Detachable Fan Guard]The USB cooling fan features 5 blades to maximize for a cooler, softer breeze. In addition, the removable fan guard makes it easy to clean the fan to avoid allergies caused by dust accumulation. [Low Noise and Portable]High quality pure copper motor reduces friction noise and provides with low noise. Weighing only 190 grams, Fan can be carried anywhere, anytime. It can be used as a handy fan, a neck cooling fan that can be worn around the neck when going out, or as a desktop fan during work. size: 0 9 x 18.8 x 4.65cm Material: ABS+PC colour: green Package Contents: 1 x fan 1 x lanyard 1 x base 1 x USB cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.