The O2 Cool FD05004 is a compact 5-in, battery-powered portable fan designed for versatile use perfect for camping, power outages, office desks, and travel. This fan offers a two-speed motor for quiet yet effective cooling, folds for easy storage and transport, and tilts to direct airflow where you need it. With a runtime of up to 55 hours on low speed using two D-cell batteries, its built for extended use when you're off the grid.