Saw outside square dancing in front of a player with a screen, the sound is quite big, the screen seems to have a sliver of buttons next to the machine and carry handles

Hello; you are talking about outdoor audio, built-in battery, with a display, high-power speakers. Can be used for outdoor karaoke, and square dance music accompaniment. The screen next to a sliver of buttons is the switch, tuning, selecting songs and other buttons. This kind of sound has big and small. There are portable or towing. Generally sell electrical appliances in the mall have.