The CAFRAMO Battery-Powered Crew Fan allows you to enjoy up to 300 hours of cooling from this folding portable fan. Variable speed settings make it easy to adjust the output to suit your needs. FingerSafe blades. Battery Type: 4 D” cells (sold separately) Capacity: 70–185cu. ft./min. Blade: Soft plastic Safety Features: FingerSafe blades Dimensions: Folded: 5-1/4"L x 5-1/4"W x 2-1/2"D Material: Plastic Warranty: One year