A:Answer Don't get this if your goal is to have music playing back while teaching a Zumba class. Not only will your vocal instructions drown it out but so will the movements and breathing of the people participating in your class. You want something much, much bigger like a UE Megaboom, JBL Extreme, Harman Kardon Onyx, Bose SoundLink III, or any number of Sony, Bose, and Sonos speakers if you don't care about having a battery in the actual speaker. I recommend the UE Megaboom. You can eventually get two (or more) and link them all up together via Bluetooth so that you really fill the room with sound.