O2COOL's 5-inch portable fan is perfect for indoor or outdoor activities, use in a hot office or at school, on a picnic and especially during a power outage. Our 5-inch fan is the perfect accessory. This fan runs at two speeds: high and low. It has an adjustable tilt for directional airflow. It’s compact folding design for easy storage. The fan requires 2-D batteries (not included). Battery run time: 55 hours (low) and 30 hours (high). O2COOL’s fans include a range of sizes, multiple power source options, patented fan blades for efficient operation and compact designs that allow you to take the cool anywhere you want to go. For 25 years, O2COOL has been a leading designer, manufacturer and distributor of creative consumer products that solve unique problems. Our products are innovative, multi-functional and cool by design. Founded in 1992, we are a market leader in the portable cooling and hydration industries. In 2015, we expanded into the Pool, Patio & Beach as well as Pet categories for the active consumer. In 2017, we added bobble and Zing Anything to our family of products solidifying our commitment to the active lifestyle consumer. Cool by Design.