2 Power ModesSilent 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/computer laptop, power bank, AC adapter, car charger and other USB-enabled. Compatible with power supply. Desk fan can be used indoors and outdoors. (Note:this mini fan contains 1800mAh battery) Premium super quietUSB silent fan is made of high quality ABS, thickened shell and smooth edges, stylish 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 speed modes AdjustableBattery desk fan adopts stylish 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 StabilizationThis 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 desk 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.