4 Speed Choices & 90 Degree Variable Tilt Head OCOOPA desk fan offers natural wind, sleep wind, neutral wind, and strong wind with four adjustable wind speeds, providing comfort in various temperature environments. The desk fan features a 90-degree tilting head to customize the airflow direction. You can easily tilt and adjust the fan head to your preferred angle.12H Working Time & Cordless Use The USB desk fan is equipped with an upgraded 4000mAh battery, providing 3.5 to 12 hours of runtime on a full charge. It is suitable for use at home, in the office, or outdoors. The fan can operate without being plugged in, making it a practical solution for indoor and outdoor use during hot weather. It can also be used while charging.Removable Fan Cover & Durable Battery The removable front cover allows for easy cleaning. This personal mini fan meets international voltage requirements and features a built-in optimized PCB chip that provides charge and discharge protection, overheating protection, and short-circuit prevention to ensure battery longevity and safe operation.Super Quiet & USB Powered Our quiet desk fan can be charged using any standard USB power source, such as a power bank, laptop, desktop, adapter, or wall charger. The brushless copper motor is designed for high speed and low noise, making this portable fan ideal for use during work, study, sleep, or relaxation without disruption.Portable & Safe Design The mini desk fan measures 13.8 x 7.5 x 18.3 cm and weighs only 296g. It features a high-density grille with a front spacing of 4mm and rear spacing of 7mm, designed to prevent fingers from reaching the blades, enhancing safety, especially around children.