A professional 15" 800W Portable speaker with remote control, an integrated USB port and SD slot for playing MP3 files. This "all in one" system is equipped with a BT receiver for audio streaming and two VHF wireless microphones operating on different frequencies. Operates via the mains or a 12V built-in rechargeable battery and can therefore also be used outside efficiently. Comes with retractable handle and wheels. At the rear there are two microphone inputs and an echo effect for cable microphones, AUX line-input, MP3 control panel, controls for tone adjustment etc. This complete system is indispensable where a good audio reproduction is desired.