Customer Service & Warranty: Citreal Shop delivers in-vehicle safety, the marine stereo provides 1-Year product warranty. lifetime tech support, please feel free to contact us, we strive to provide the best products along with superb customer service. Marine Stereo&Package List: The head unit receiver Bluetooth radio supports AM /FM/ USB/ AUX.Marine stereo package list 1 x Water Resistant Media Receiver;1 x Wiring Harness;2 x Installation Nuts;1 x speaker;1 x User's Manual. Inputs &Outputs: The USB port gives you have a vast library of audio files. The auxiliary input is compatible with audio output from smartphones and MP3 players; Use the front/rear pre-amp outputs to hook up your speakers. Bluetooth Streaming: Play and control music through your smartphone or MP3.This style marine radio for wireless audio streaming and works with all of your favorite devices like iPhone, Android, smartphone, iPad, tablet, etc. Waterproof: IPX66 Water Resistant. Well Sealed to avoid Fogging/Moisture inside the screen. Hit the water and enjoy your music with the marine-grade stereo. this marine stereo radio is protected from the elements.