The SKIL 12V/20V Brushless 4 In. Clamp Fan can be powered by either PWR CORE 12 or PWR CORE 20 batteries. It also offers a hybrid AC option to be powered via USB-C. This convenient, compact clamp fan delivers powerful airflow up to 200 CFM with airspeeds up to 12 MPH. Its industrial threaded clamp provides strong holding capacity. This cordless fan is built for tight spaces or easy on-the-go use, and its multidirectional pivoting and swiveling head can send air where you need it. It runs up to 14 hours on low when powered by a PWR CORE 20 2.0Ah 20-volt battery or up to 8.5 hours on low with a PWR CORE 12 2.0Ah 12-volt battery (batteries sold separately).