Set consists of one active speaker with integrated amplifier and one passive speaker. 2-way bassreflex systems with 30 cm woofer (12") and 3.4 cm tweeter (1.34"). MP3 player with Bluetooth receiver and IR remote control, SD card slot and USB input. Stream music wirelessly from your mobile devices (e.g. smartphone, tablet) via Bluetooth. UHF receiver unit and matching wireless microphone. Operation of the hand-held microphone via 2 x AA batteries (not included). 1 mic input with separate level controls, 1 line input XLR/6.3 mm jack) with separate level control, XLR output for linking further active speaker systems. Master control with 2-band EQ, clip and power LED, Limiter for overload protection. Light-weight black plastic enclosure with metal grille and carrying handle. 36 mm flange for stand installation and delivery includes speaker cable. Controlling by IR remote control.