2 Power Modes: Silent usb fan is powered by rechargeable battery and 1.5m USB cable, which can be connected to any device with USB port, such as B. PC/Laptop , power bank, power adapter, car charger and other USB compatible. Compatible with power supply. Desk fan can be used indoors and outdoors. (Note:this mini fan contains 1800mAh battery) Premium super quiet:USB silent fan is made of high quality ABS material, with thickened shell and smooth edges, elegant and durable, without any smell. The small fan keeps you cool while producing minimal noise (between 20-30dB) so you won't be distracted while you work, read or relax. 3 adjustable speed modes : Battery desk fan adopts elegant touch hidden switch button. Simply press the touch button on the top of the portable fan to switch between low, medium and high speeds. Meet your different cooling needs. 360 Rotation and Stabilization: This table fan can be rotated 360 degrees to provide wind in any direction, allowing you to cool down quickly. The bottom features a non-slip silicone base that helps reduce vibration and increase friction, providing stability and preventing slippage even when working at high speeds. Portable usb fan: desktop fan is small (17.5x16x9cm), delicate and easy to put in your pocket. Weight (430g), light weight and space saving. This powerful usb fan is perfect for office, dorm, home, bedroom, library, camping, travel, etc.