The VPS122A is a complete plug & play set, ready to get your party started. The set contains a pair of 12 "speakers, one active and the other passive. In the active models, the integrated amplifier incorporates a USB / SD player for MP3 files and a Bluetooth receiver for streaming audio of your music from Smartphone or tabet. Both speakers incorporate a ring Blue LEDs to color the woofer and light up your party Completing this kit comes with tripods and cable mic for karaoke events or presentations.