【Ultrasonic Cooling】 Experience unparalleled cooling with our ultra-quiet 36 dB operation and turbo-blasted blades, delivering a concentrated, powerful airflow without noise pollution. 【Double-Sided Clip Design】 Securely attach the fan to the inside or outside of your waistband, pocket, or backpack, keeping your hands free while working outdoors, walking, or commuting. 【Three Adjustable Speeds】 Customize your cooling with three adjustable speeds. Choose between a gentle breeze or a powerful airflow, allowing you to adjust the wind intensity to your activity level and ambient temperature. 【Lighting Function】 This reliable hands-free flashlight illuminates your path during early morning runs, evening walks, camping trips, or unexpected power outages, adding an extra layer of safety to your adventures. 【Shock Resistant】 Built for longevity with a durable, shock-absorbing silicone exterior that protects the fan from drops and impacts. The 4000mAh model for long-lasting use throughout the day.