The BREZA AC/DC Plus is a high-end emergency aeration system designed to safeguard your saltwater aquarium during unexpected power outages. It switches from standard AC operation to battery mode automatically, ensuring continuous air supply when the electricity goes out. This pump includes two output ports for versatility in multiple tank setups or areas within one large aquarium. With its rechargeable Lithium-Ion battery and adjustable flow control dial, it guarantees optimal oxygenation tailored to your specific needs. The BREZA AC/DC Plus also operates quietly due to its specialized motor housing and vibration-dampening feet, making it an ideal choice for sensitive marine environments. This product is best suited for aquarists who value reliability and peace of mind, especially those with valuable or delicate reef ecosystems that require constant aeration.