Maximum air movement - 14-inch 5 blade design and built-in powerful motor gives strong and steady stream of cool air at 2 different speeds with max Airflow 4500MAh capacity - replaceable and rechargeable sealed lead acid battery (included) provide 5-8 hours working time (depends on the speed chose) Ac and dc power capability: the fan can be powered from ac mains power as well 151 Degree swivel fan head - for precisely directed airflow 2W LED light - 15 hours backup 5v USB port for charging