Mini desktop fan: Its main features include USB power supply, 3-speed wind settings, 360° rotation, and can be powered by devices with USB interfaces such as computers and adapters. You can repeatedly press the button on the back of the fan to switch from low, medium, high to off. The first stage: 3.9m/s. Class 2: 4.9m/s. Class 3: 5.9m/s. Even in places without air conditioning, it can keep you cool | 360° rotation & stability: The fan head of the electric fan can rotate vertically 360 degrees, and you can tilt it to your desired angle to cool down quickly. The desktop fan is designed with 2 anti-slip rubbers on the bottom to reduce vibration and increase friction, making it more stable and preventing sliding even when working at high speeds | USB-powered: This portable fan is powered by a 1.2-meter USB cable (non-removable), compatible with 5V output devices. It can be plugged into any device with a USB port, such as a PC, laptop, power bank, USB wall charger (not included), car charger, and any other USB-enabled power source. (Note: this fan does not include a battery) | Silent Upgrade Design: The silent desk fan has 3 curved blades, reducing wind resistance and increasing available airflow area. At the same time, it is equipped with a powerful silent motor to reduce noise. Even at the highest speed, the noise remains at 40-50db | Compact Size and Application: This is a 4.7-inch mini fan with dimensions of 12*12*5.5 cm (4.7"*4.7"*2"), weighing 0.35 Pounds, light and space-saving. This portable fan is perfect for offices, desktops, dorms, homes, bedrooms, libraries,or anywhere you need to cool off. The noise level is lower than 50 decibels, providing you with a quiet enjoyment