Speaker cooler bag. Enjoy music from your CD player or MP3 player through the high quality speakers built into this cooler bag. Cooler bag holds up to 20 twelve ounce cans. Inside is insulated and leak proof. External pockets and stretch cords to hold utensils, napkins and more. Adjustable shoulder strap. Made from 600D polyester and 420D web-weave nylon. Uses 4 AA batteries (not included).