Kevlar cone with butyl rubber surround offers a lifetime of listening enjoyment;Micro-slim magnetic round grill offers protection from dust or damage; Pivoting 0.75” Titanium dome tweeter for pristine highs and adjustment for optimum listening;Front accessible environment EQ for fine tuning to the installation environment;Dog-legs make installation fast and easy;Bluetooth 4.1 smart technology for quick pairing and ear-pleasing streaming audio; 60 Watt on-board amplifier allows for independent use and enough power to drive a second passive slave speaker.