**Covert Air Technology makes the RIDGID 18-Volt Hybrid Fan the quietest and most powerful fan in the industry **Over 10 hanging options for ultimate versatility on the jobsite **Variable speed dials to easily adjust fan speed **Extended runtime with over 45 hours with a RIDGID 5.0 Ah Lithium-Ion Battery (AC840089 - sold separately) **Maximum air flow produces best-in-class 475 CFM **240° head rotation directs airflow where desired