Two power sources: Powered by USB charger and 2500mAh rechargeable lithium battery for longer working time. Outdoors, the fan can be used for 2-8 hours on a full charge (depending on the speed).2. Adjustable speed: one key to control the 3-level wind speed, press the switch once for the lowest wind speed, press the switch twice for medium, and press the switch three times to display the maximum wind speed; suitable for offices, families, dormitories, study rooms, strollers, wheelchairs, travel , car or headboard, etc. Cool feeling for hot summer3. 720 degree rotation: This mini desk fan uses a powerful brushless motor. The maximum speed is 4000 rpm. 720 up and down rotation, left and right adjustment, enjoy the cool wind from all directions5. Desk fan with clips: New version, strong and stable base with sturdy clips, suitable for boards within 5cm, such as desks, headboards and stroller handles or simply put on desks, with under the fan 4 rubber pads, no damage to furniture, no slippingSafe, lightweight and easy to clean: ABS grille, small enough grille, soft fan blades, no need to worry about accidentally hurting your baby's fingers; grille can be removed for cleaning. Box for storage when not in use.