•USB Powered Only •4 Speeds Adjustable & Strong Wind  •Safety Upgraded •USB Powered Only JISULIFE small desk fan with USB-C charging port, compatible with power bank, PC/laptop, AC adapter, car charger and other USB-enabled power supply. (Note: This fan does not have a battery) •4 Speeds Adjustable & Strong Wind JISULIFE desk fan possess low/medium/high speed levels, and sleep mode. Short press the power button to adjust the appropriate fan speed. Three wind speed options provide you with more choices in different environments. Equipped with 7 fan blades and copper brushless motor, it provides powerful wind at a stable speed to cool you down quickly. •Super Quiet & All-Round Air Supply JISULIFE USB desk fan adopts a silent structure with less than 30dB noise, and can be flipped up and down 330 °to provides high airflow while achieving ultra quiet. Better to accompany your work or sleep without disturbing you. •Safety Upgraded JISULIFE desktop fan with high-density security barrier design, intimate protection, no hand injury； With non-slip silicone base, skin-friendly soft rubber, non-slip and stable. Perfect for office, home, desktop, dorm, camp, laptop, library, garden, bedroom, travel,etc.