USB desk fan ? [Warranty] 1 year. If you have any questions, please message us first and we will answer you within 24 hours. If there is any condition of the product, we will provide you with satisfactory warranty service and best warranty plan. Mini fans portable USB powered & one button start?This portable desk fan is powered by a long USB cable (4.92 feet) and can be used with computers, laptops, power bank suits, etc., USB-enabled power supplies and adapters. One button switch, one button start usb fan, fast, free to choose the wind gear. Removable frame for easy cleaning of fan blades and frame, usb port plug and play. Small desk fan quiet ?super wind & 4th speed? long press the button for 3s to enter the highest setting (speed 4). ?Note?The highest setting will only take effect when the output current reaches 2A. When the current is below 2A, it automatically jumps to speed 3. With low/medium/high/super wind speed levels, this variable speed design provides you with more options in different temperature environments. Ultra thin table fan Ultra thin and stable & enjoy the whole summer?2.5" fan thickness makes the desktop fan is not synonymous with bulky, super strong airflow allows you to enjoy the whole summer, aluminum alloy thickened bracket makes it more stable, no vibration noise, non-slip silicone pad at the bottom that increases the friction and will not scratch the desktop. Quiet desk fan Five-blade fan & super wind sensation?Through simulation testing and inspection of airflow, this 7-inch USB desk fan uses the optimal pear-shaped five-blade fan, which can control the frontal airflow to the maximum extent even at the highest speed, reducing the loss of airflow from the side, and also effectively reducing wind noise. USB portable fans 4-speed wind speed & 35dB low noise? Intelligent 4-speed air speed , easy to set, powerful, natural and quiet. With minimum and maximum air speed modes operating between 35dB and 55dB respectively, quiet airflow is essential to ensure you and your family can enjoy a good night's sleep without any disturbance.