Check the listing for details. Vintage 80s Max Air Waves Inflatable Speaker - New Old Stock - Cube Shape. Condition: Open box. Listed at 30.00 USD. Bring back the 80’s and pump up your tunes with this super rad speaker (that also needs pumped up)! The Max Air Waves Inflatable Speaker is a very rare blast from the past that will give your cassette tape jams a whole new look and sound. Just blow it up, hook it up to your stereo using a stereo jack, and you are ready to rock! No amp or batteries needed. And if you do rock out too hard, no worries because it also comes with a patch kit just in case. The box has been opened BUT the speaker is still sealed up tight in its original factory packaging. This is an item that has been very hard to find additional information BUT I can say that once inflated the speaker measures roughly 17x17x17 (not counting the little legs that come on it).