Powerful Airflow & Long Runtime. This battery operated fan stays cool with 7 aerodynamic blades delivering wind speeds up to 12+ mph. The 9-inch fan offers over 33 hours of runtime on low speed, perfect for camping, outdoor adventures, or emergencies | Bougerv | | Portable Fan 20000mAh Rechargeable Travel Outdoor Camping Fan 4 Speeds with Warm Hook Brighter LED Light for Camping RV | Best Buy