The V Series is an an active, 1200W portable bi-amp loudspeaker with a built in USB/SD/MP3 Player and BT wireless with digital display and controls. The USB/SD controller allows for user to insert a USB or SD flash drive with prerecorded audio files. The BT wireless function allows users to easily connect Bluetooth enabled devices to the speaker and play audio without the hassle and cost of long cables. The controller comes with Play and search functions as well as its own volume knob and digital LCD display.