This high-quality air pump is designed for 5-gallon buckets and insulated chests. Output is .03 cfm at 12"—that's enough for 1/2 lb of minnows. Its low amp draw provides over 100 hours of operation on two alkaline D cell batteries (not included). This great little aerator comes with an air diffuser, 30" of tubing and a clip for attachment to a bucket. Six-month warranty.