Olmaster CF-1691 USB cooling fan is not only for devices but also for user's cooling. Adjustable stand for all size of devices. Support hot swappable. Power by USB cable. It is the USB vertical and horizontal cooling fan with bracket. Features: [Plug and Play] Olmaster CF-1691 USB cooling fan no need for any driver or any installation, you just plug and play. Your laptop can breathe easily with this notebook cooler. [Compact and Portable] The USB cooling fan with compact size, it is portable for you to use. With adjustable stand for all size of devices. Vertical or horizontal cooling for notebook, tablet, smart phone and user. [Cross Flow Fan] Olmaster CF-1691 USB cooling fan is designed with a cross-flow fan, make sure the airflow is much stronger than a normal PC fan. Fan speed control with LED light. [Adjustable Stand Design] Olmaster CF-1691 USB cooling fan speed control(low / medium / high, three modes adjustment). Adjustable stand for all size of devices. Support hot swappable. Power by USB cable. [Horizontal Axis Design] Olmaster CF-1691 USB cooling fan is the USB vertical and horizontal cooling fan with bracket, which is not only for devices but also for user's cooling. Specifications: Brand Name: Olmaster Model Number: CF-1691 Material: Plastic Fan Rotating Speed: 2100-2900 Fan RPM: 2100-2900RPM Rated Voltage: 5V Noise Level: 28-34dBA Application: Compatible with all devices and users Color: Black Main Item Size: 28.6 * 6.5 * 6.5cm / 11.26 * 2.56 * 2.56in Main Item Weight: 453.2g / 15.98oz Package Size: 32 * 8.6 * 8.6cm / 12.60 * 3.38 * 3.38in Package Weight: 556.3g / 19.61oz Package List: 1 * USB Cooling Fan 1 * USB Cable 1 * User Manual