The Lanzar Opti-Drive Series OPTIMC91BT Bluetooth weatherproof speaker system is what you need to upgrade your audio system. This 700 watt mountable speaker and amplifier kit comes with a pair of 3'' -inch weatherproof dual aluminum die-cast bullet-style speakers and four-channel micro amplifier to add some serious sound where you need it. Take your listening experience to the next level and wirelessly stream music once paired with your Bluetooth-enabled device - or connect your Smartphone or MP3 Player directly via the 3.5mm Aux jack to instantly stream your favorite music. You can also charge your device at the same time with the wired mountable USB port. This kit comes with everything you need to get going including, stainless mounting hardware, brackets and accessories. Create a custom system installation that will add some serious sound power. Whether you've got a motorcycle, ATV, 4x4, snowmobile -- the Lanzar Opti-Drive Bluetooth Speaker & Amplifier System will make your next ride the best one yet.