Perfect for indoor or outdoor activities, Treva by O2COOL's 5-Inch portable fan can be used in the office, at school, while camping, and especially during a power outage due to a thunderstorm, hurricane or high winds. It operates on two D-cell batteries (not included), features high and low speeds, and boasts a patented fan blade design that extends the battery life while maximizing airflow. Cool by design, this portable fan is also easy to carry so you can take the cool with you. The next time lightning strikes, make sure you're prepared to power up with Treva. DESIGN 2-speed desk fan Base tilts to direct airflow Folds for storage and transport Battery Life (high): 30 hours Battery life (low): 55 hours Requires (2) D Batteries (not included) Style: FD05004AMG