Perfect for indoor or outdoor activities, the O2COOL 10-inch Battery Operated Portable Fan is perfect for a small room, RV, or camp, and it is great for weather emergencies during warm weather. It operates on six D-Cell batteries (not included) or optional AC adapter (not included) which can be plugged into an electrical wall outlet for flexibility. The 10-inch Battery Operated Portable Fan also offers 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 features a foldable design with a built-in handle so you can take the cool with you.