350 Watts x 2 Channels Micro Amplifier with wire harness - Pair of Chrome Handlebar Clamps - Easy Chrome Stainless Mounting Brackets and Accessories included - Bluetooth 3.0 technology - Speaker Dimensions : 4.8"L x 3.35"W x 3.35"H. 2/4 Channel for up to four speaker hookup (175 Watts x 4) - Chrome Universal Handlebar Mount Rotary Volume Control - Bluetooth auto connected while power on - Amplifier Dimensions : 5.71"L x 3.05"W x 1.19"H. Includes Two handle-bar Mount Aluminum Die-cast Weatherproof 2.25" Speakers - Chrome Stainless Universal handlebar audio mount - Bluetooth auto disconnected while Aux-in (3.5mm connector). Two additional amplified channels for a total of 4 speaker hook-up - 12 Volt T-TAP Plug for direct connection on American made Motorcycles - Bluetooth console Dimension : 2.36" L x 1.65"(W) x 0.87"(H). 3" Dual Aluminum die cast bullet Speaker with Supreme high temperature Voice Coil - USB charger & Satellite 5V plug - Easy and quick installed handle-bar mount bracket is included 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" 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 you pair your Bluetooth-enabled device - or connect your iPod/MP3 player or smartphone into the 3.5mm jack to instantly stream your favorite music. Charge your device at the same time with the conveniently located USB port on the amplifier. 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, snowmobile, this Bluetooth weatherproof speaker system will make your next ride the best one yet!