Two power sources - Longer runtime. Rechargeable lithium battery or USB charging. The USB rechargeable fan battery comes with a 2800mAh 18650 lithium-ion battery for extended outdoor use (2.5-8 hours depending on the speed). The battery takes about 3 hours to fully charge. This USB desktop fan is also USB powered for indoor use such as computers, laptops or power banks, bringing more convenience New version of DESK dual-use USB fan. The USB fan with upgraded version and unique base design can be placed on the desk or securely attached to the desk, coffee table and headboard with a sturdy clip suitable for boards within 5cm. Equipped with rubber feet to avoid damage and slipping. Suitable for the office, home, dorm, stroller, car or bed for extra freshness on hot days Super Quiet & 720 Degree Rotation - We use the brushless motor for this fan. The brushless motor makes this fan very quiet when working. The silent USB fan with quiet operation allows you to sleep comfortably without disturbing the noise. Support 360 horizontal and vertical rotation. Adjust the wind direction with 360 up and down, left and right. You can enjoy the cool wind in all directions. 3 Adjustable Speeds - Quiet USB Fan: Our USB desktop fan is designed with a single switch for easy and flexible use. 3 strong wind breeze modes, speed 1 is the weakest wind, speed 2 is medium and speed 3 is maximum. (Use powerful brushless motor, max speed up to 3500RPM, low noise up to 30-36dB) Safe, compact and lightweight mini USB fan - 5 inch portable frame saves desktop space, the mini USB fan with safe ABS mesh, the cooling grille is quite small, using soft polypropylene sheets, so You don't have to worry about accidents, even harmless to baby. Effective protection against accidental injuries 360 x 360 and adjustable speed modes. As you can see from the picture, it can be tilted and rotated 360 x 360. Adjust the air to any angle for direct airflow. You can adjust the fan speed from low to high to suit your needs. Eco-friendly and quiet. This mini USB fan is made of high quality ABS material and equipped with copper core electric motor, making this fan very durable and quiet. You can sleep next to him. The grille has small slots to avoid the risk of injury if you put your fingers near the fan. Features: - Mini fan: easy to use, easy to carry. - 18650 battery: can not use USB port for a long time. - Strong Clip: Can be hung on desk, bed, stroller, etc. - Angle adjustment: 720 degrees horizontally adjustable manually vertically 90 degrees - Strong and soft wind. Features: Wind Speed Setting: Liner speed setting Power: 4.5 W. Operating time: 2 to 8 hours (depending on the selected speed level). Battery: 2800mAh and 18650 rechargeable lithium battery. Charging time: 1.5 - 3 hours. Charging current: max. 2 A. Net Weight: 240g User Manual (French not guaranteed). 1. The USB cable connects to the USB port of your PC, laptop, mobile charger, etc. 2. Turn on the twist switch on the mini fan at the most. 3. Turn off the twist switch on the negative at the top of the mini fan. Content: 1 mini USB fan. 1 USB charging cable. 1 18650 battery.