Introducing the Engel Live Bait Aerator XL - the ultimate solution for keeping your live bait fresh and lively! Based on the game-changing Engel USB Lithium-Ion rechargeable aerator introduced last year. The Engel Live Bait Aerator XL is equipped with not one, but three 2000mAh Lithium-Ion rechargeable batteries, a new 2.5" hockey puck style aerator stone, double the air pressure at 3.0 STL/minute, and up to 72-hour battery life. Still the quietest pump on the market!