USB : Built-in 1800mAh battery charges via USB from a power bank, lap, or , providing extended hands-free use. Brushless Motor: copper brushless motor delivers strong airflow with low noise and long lifespan. Neck Hanging Design: Wear around the neck to keep cool while cooking, gardening, fishing, hiking, or working without using hands. Adjustable Speeds: Three speed levels (low/medium/high) allow easy adjustment to suit personal cooling needs. Double Head, 360° Rotatable & Foldable: Two fan heads rotate and fold for wind direction and can also sit on a table as a desk fan.