Chauvet DJ 4BAR LT BT ILS 4BAR LTBT ILS is a convenient pack-n-go system that's easy to set up, easy to tear down, and easy to control. The addition of ILS technology means the system is now easier than ever to create synchronized light shows withThe in-system Bluetooth® wireless technology means you can create and control dynamic looks straight from your phone or tablet without additional hardware using the BTAir app. While D-Fi USB compatibility means lead/follow setup and DMX control are a breeze. Achieve total room or stage coverage with the four individually adjustable pars. However you choose to setup and control this system, automated programs and built-in sound-activated programs make 4BAR LTBT ILS an ideal solution for set it and forget it lighting setups.