The VPS152A is a complete plug & play set, ready to start your party. The set contains a pair of 15" speakers, a passive and an active model. The active model houses the amplifier which has a built-in USB/SD player and Bluetooth wireless technology to stream your music from your smartphone or tablet. Both speakers have a blue LED ring around the woofer to colourize and illuminate your party. Completing the kit is a wired microphone for karaoke or presentation purposes.