BLUETOOTH: Play and control a vast library of your favorite music using your smartphone or MP3 device, plus plug into apps like Spotify and Pandora wirelessly | AMPLIFIER: A Bluetooth, compact, weatherproof, class D amplifier is included. | WEATHERPROOF: The MCBK470B has been outfitted with the latest weatherproofing techniques for protection against the elements | SPEAKERS: Also included are four 3-inch, black, full range speakers. The adjustable brackets will fit handlebars from ranging from .75” to 1.25” | PLAYBACK: A 3.5 mm auxiliary input is compatible with audio outputs of smartphones and MP3 players | VOLUME CONTROL: A convenient inline volume control can be installed in a place of your choosing, making sure that when the need hits… so will your tunes | WARRANTY: BOSS Audio Systems provides a powerful 3-year platinum online dealer warranty so long as the purchase is made through Amazon.com. We strongly encourage professional installation of this product to ensure proper and safe functionality

[UPGRADE BLUETOOTH FOR YOUR BOSE Sounddock]: Using DockLinQ to add bluetooth for your Original Bose SoundDock, Bose SoundDock I, SoundDock II, Portable SoundDock, SoundDock 10 and other 30 pin Music Docking Stations. Plug, Pair, and Play, no more actions, rescue your old docks, enjoy music wirelessly. Support any version of iOS and Andriod devices including iPhone, iPad, Samsung Galaxy, Google Pixel, LG, HTC etc. | [QUALCOMM CSR BLUETOOTH TECHNOLOGY]: Powered by Qualcomm CSR Premium Chipset, Outputing High Quality Sound, Extra Long Bluetooth Wireless Range. DockLinQ bluetooth range is 70 feet in open air while other brand is 15-30 feet. DockLinQ supports 2 devices paring which enables you to pair bluetooth with your iPhone and iPad simultaneously. | [ROBUST ALUMINIUM SHELL DESIGN]: Elegant and Simplism, Better Sturdy 30 pin Plug. Aluminium shell design makes nice tactile. IMPORTANTLY our aluminium shell is much more robust while many buyers complained other brand's 30 pin plug is loosen and plastic case is easy to be broken if falling on ground. | [BUILT-IN 5 HOURS BATTERY WITH AUX-OUT JACK]: Thanks to built-in 5 hours battery and AUX-OUT jack, DockLinQ can rescue your premium wired headphones since iPhone 7 cancelled 3.5mm aux jack. | [NOT COMPATIBLE FOR ALL DOCKS]: Please refer to #4 picture to check compatible docks. IMPORTANTLY please refer to #5 picture to check uncompatibile docks before order. DOESN'T WORK WITH AUDI,VW,MERCEDES,BMW,INFINITI,NISSAN. We have Airdual powered by CSR and apple MFI chip for car ipod connectors which support original steering wheel control and head unit control. We strongly recommend buy Airdual for car iPod connector. Please check www.amazon.com/invery to select correct model for your car.