The Alto Professional Stealth Xpander Kit with Two Wireless Receivers replaces hundreds of feet of audio cable with a reliable wireless connection. Grow your Stealth Wireless system with the handy Expander Pack, containing two additional single channel receivers. The Stealth Wireless system quickly creates a robust, invisible connection from the output of your mixer to the inputs of your active loudspeakers. Using the Expander Pack, you can additional active loudspeakers to your array to create a larger system, or to provide multi-room coverage. There's no need to snake, secure, or hide any cabling during set up. After the show, simply disconnect the system and be on your way-no more tedious cable coiling at the end of the night.