Portable tower fan uses USB power supply, compatible with multiple power sources like laptops, USB adapters, and more for flexible use in various spaces. Desk tower fan comes with two adjustable speed settings, allowing users to customize airflow to suit different cooling needs throughout the day. Mini tower fan features a tower-shaped air duct design that powerful airflow while operating at low noise levels, making it ideal for undisturbed work or rest. Small tower fan for desk operates at a rated power of 2.5 watts, ensuring energy-efficient performance without compromising on cooling effectiveness. Desktop tower fan has a compact 10.5x33cm size and stable base, perfect for fitting into narrow areas such as office desks, nightstands, or small living spaces.