FEATURES: O2COOL's 4-inch clip fan features a heavy-duty clip that makes it easy to secure onto your baby stroller or crib Our fan is powered by 2 AA batteries (not included) and doesn't require a plug in case of a blackout. A light-weight construction makes carrying it around hassle-free An adjustable neck makes it easy to move the fan head for directional airflow. Adjust your fan to the optimal position for summer strolls Our clip fan is aware of your little one's curious nature! The tight openings of the fan cover keep your child's fingers in the utmost protection wherever you go Our 4" blades are energy efficient and uniquely designed to provide optimal cooling