O2COOL Portable 5 Inch 2-Speed Directional Airflow 4 D Battery and AC Powered Table Fan (adapter not included) DUAL POWER SOURCE: Plug in with the optional AC adapter (not included) or use with 4 D Cell batteries (not included) POWERFUL: Two-speed fan offers quiet cooling COMPACT design makes it great for travel; easy to carry and store. Measures approximately 8" H, 7"W, 3"D DIRECTIONAL: Tilts for directional air flow ONLY FAN in Its Class Using 4 D Batteries for Ultimate Power and Battery Life.