Feature:1. This marine stereo has portable media functions, AM/FM radio, USB and auxiliary input for connecting portable media devices, and can be easily slid into the instrument opening or cup holder.2. 4 x 45 watts of power operation, strong power, sturdy chassis and IP66 waterproof rating, can be installed in the bathroom, durable.3. It has an AM/FM radio and RCA Aux audio input on the back. When you connect an MP3 player or flash drive to the back USB port, it can also play your digital MP3 files.4. This unit also supports Bluetooth, which can transfer music wirelessly from your phone or similar Bluetooth devices. A line output is also provided to connect to an external amplifier.5. Waterproof materials plus special UV coating on plastic surfaces, coated circuit boards and connections ensure that these marine and outdoor products are corrosionresistant.Specification:Item Type: Marine Bluetooth SpeakerMaterial: ABS+MetalShell Material: MetalPurpose: Marine SpeakerRemote Control Battery: CR2025Battery Capacity: 150mah, Battery x 1 (Built-in)Waterproof: IP66Power (Maximum): 80WApplication: Car, Outdoor, Yacht, Marine ATV UTVSpeaker Unit: 4Connection Method: Bluetooth ConnectionInterface Type: USBFrequency Response Range: 60Hz-15KHzOutput Power: 4 x 45W (Up to 50W)Signal to Noise Ratio: 75dBPower Supply Mode: External 12V Power SupplyChannel: 5.1Extended Storage: Not SupportedBluetooth Protocol: 2.0Number of Speakers: 4Effective Distance: Approx. 8m/8.75ydOperation Mode: ButtonPlay Format: MP3Whether to Support APP: NoSupport Format: U DiskSpeaker Adjustment Method: ButtonRadio Function: Yes.Package List:1 x Speaker1 x Bolt1 x Nut1 x Mounting Bracket1 x Gasket1 x Remote Controller1 x Signal Wiring Harness1 x Light Wire1 x ManualNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.