Plug into the lightweight BA-330, and you won't believe your ears! Not only does this portable PA system give you four channels of amazing sound, but it can also be battery powered, so you can take that great sound anywhere. It's even got built-in effects right onboard, so you can add a professional sheen to your sound. Need to play backing tracks? Use the auxiliary input to play music from your MP3 or CD player (there's even a built-in pocket to hold it!). The Roland BA-330 is your take-anywhere PA!