JMS4SPKG Marine Entertainment System AM/FM Bluetooth with 4 AMS602W Speakers & Aux InputFeatures:160 Watt (40W x 4)Waterproof (IPX6)BluetoothA(R) streaming audio (A2DP/AVRCP)USB input allows connection of digital media devices (MP3/WMA player)AM/FM tunerWeatherbandFour-channel amplified audio outputRear auxiliary input (RCA)Rear auxiliary output (2-volt)Conformal coated circuit board prevents damage from high humidity and saltCorrosion resistant materials/finishes (ASTM D4329)UV resistant front panel (ASTM B117)