Perfect for indoor or outdoor activities, Treva by O2COOL's 10-inch Battery-Operated Portable Fan can be used in the office, on a picnic and especially during a power outage. It operates on six D-cell Batteries or can be plugged in with its AC adapter, 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 with its built-in handle so you can take the cool with you. DESIGN 2-speed 10" fan Built-in handle and compact size for storage and transport USB port charges cell phone or other devices Battery Life (high): 24 hours Battery life (low): 43 hours Operates with AC adaptor Operates on (6) D Batteries (not included) Style: FD10002AU