The Cooladio gives you everything you need for a great day outdoors. The cooler features an 18-can capacity, an insulated leak proof liner and a sturdy 600-dernier nylon exterior. In addition the cooler is also MP3 ready with an audio input jack and cables for an MP3 player or CD player. There is a speaker headset jack and an AC/DC 9 V adapter jack as well. Cooler requires a 9V battery (not included) for the speakers to work. Great combination for fun.