Durable + Easy to Use Stroller Fan: O2cool’s 4-inch Clip Fan Features a Heavy-duty Clip That Makes It Easy to Secure Onto Your Baby Stroller or Crib. Hands Free Cooling: This Fan Is Powered by 2 Aa Batteries (Not Included) and Doesn’t Require a Plug, in Case of a Blackout. A Light Construction Makes Carrying Around Hassle-free! Flexible Neck Design: an Easy-to-use Adjustable Neck Makes It Easy to Move the Fan Head for Directional Airflow. Adjust Your Fan to the Optimal Position for Summer Strolls. Designed With Safety in Mind: 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. Patented 4 Inch Blades: Our Patented 4” Blades Are Energy Efficient and Uniquely Designed to Provide Optimal Cooling. Run Time: – 10.5hrs 8.18 X 5.11 X 6.88, 0.48lbs Made of durable plastic