Up to 24 Hours of High Air Flow During Power Outages Backup Battery Equipped with a lithium-ion battery that provides up to 24 hours of operation during power outages or while transporting fish. Compact Design Maxum Air is ideal for desktop use and operates quietly while providing air for your fish. The low maintenance design make it great for transporting fish. Adjustable Airflow Choose between continuous or interval air supply modes and dual airline outputs for customizable aeration Features - Dual Output - Quiet Operation - Uses Standard 3/16" Tubing - Continuous and Interval Modes - Adjustable Airflow with Touch Control Specifications - Dimensions - 7" x 5" x 2" - Air Output - 40 GPH; Pressure - 0.045MPa - Tubing Size - 3/16" - Wattage - 10W - Battery - 7V Li-Ion Battery