1) USB 2.0 outdoor speaker, for stage,shop and outdoor 2) professional speaker with USB,SD,remote control 3) high output power USB 2.0 outdoor speakerOutput( ... sets)20'G/40'G/40'H: 264/528/619USB 2.0 outdoor speaker uses in stage, shop and outdoorHigh-power; ... euphonious alt, sweet mediant, voluminous bassusb outdoor speaker with USB, SD card, FM, remote control, display USB 2.0 outdoor speaker