Energy-efficient, compact, and powerful. This fan is ideal for hurricane preparedness and also for boaters who need added circulation without using their boat's 12V system. Folds flat for storage. Features variable speeds and FingerSafe blades. Grill-less design means more airflow and comfort. Accepts AC adapter (not included). Runs for up to 300 hours on 4 D-cell batteries (not included). 5-1/4" x 5-1/4" x 2-1/2".