This systems features a large internal amplifier and has four 6.5 speakers that are sure to be hear way before they ever see you! It is a all blue tooth system that has a awesome 150 feet range! Simply turn on pair up and go! Enclosure is 100 percent fiberlgass so its sure to stand up to the abuse of off road! NOW AVAILABLE WITH BLUETOOTH CONTROLLER! AND BLACK SPEAKER GRILLS! WHITE SPIDER NO LONGER AVAILBLE!