Compact folding fan from O2Cool runs on either 4 AA batteries or plugs into a USB to keep you cool whether in a tent or behind a desk. Quiet travel fan takes up very little room yet cools small spaces efficiently. Assorted colors. 3 power sources USB, battery, or AC adapter 5 inch fan blades 2 speed fan Compact folding design for easy storage Adjustable tilt for directional airflow Requires 4 AA batteries not included USB Cable included AC Adapter not included 5 inch compact, folding fan is powered by either 4 AA batteries or plugs into a USB port for versatility Powerfull fan provides quiet cooling indoors or out using either of the dual power sources Round shape folds down to fit easily in a travel or book bag and weighs only 13.4 oz. Assorted colors Sorry no choice.